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    Active Base Layers

    22 Products

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    99
    in Boys' Athletic Base Layers

    Patagonia Patagonia Kids' Capilene Midweight Baselayer Crewneck Shirt

    $39.00 Shop now launch
    View description
    Our Patagonia Kids Capilene Midweight Crew is moisture-wicking, quick-drying and breathable for warmth in cool weather. Made of 100% recycled polyester.

    Scored Product Attributes

    99
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Recycled Polyester

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.

    This CERT verifies that products meet Fair Trade standards, ensuring ethical sourcing, fair wages, safe working conditions and environmental sustainability throughout the supply chain.

    This CERT verifies that textiles are produced with minimal environmental impact, focusing on safe chemical use, resource efficiency and worker safety as set by Bluesign.
    Warranty: 1 year

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.

    The 1% for the Planet® Impact Fund at National Philanthropic Trust offers a unique philanthropic opportunity to drive positive change for our planet and future generations.
    icon representing Environmental criteria factor Enviro

    This brand uses renewable energy sources such as solar, wind, or hydro power to run its operations.

    This brand offers repair services or programs to extend the life of its products and reduce waste.

    This brand supports initiatives to protect water resources and reduce water consumption.
    icon representing Governance criteria factor Governance

    A label that describes what it takes to make an individual product. More than just a materials listing, this includes water usage, energy consumption, cost breakdown, carbon footprint, certifications, and maybe more
    icon representing item origin Origins
    Made in Sri Lanka
    99
    in Boys' Athletic Base Layers

    Patagonia Patagonia Kids' Capilene Midweight Baselayer Zip-Neck

    $49.00 Shop now launch
    View description
    Our Patagonia Kids Capilene Midweight Zip-Neck is an all-around baselayer made of 100% recycled polyester fabric with HeiQ Fresh durable odor control.

    Scored Product Attributes

    99
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Recycled Polyester

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.

    This CERT verifies that products meet Fair Trade standards, ensuring ethical sourcing, fair wages, safe working conditions and environmental sustainability throughout the supply chain.

    This CERT verifies that textiles are produced with minimal environmental impact, focusing on safe chemical use, resource efficiency and worker safety as set by Bluesign.
    Warranty: 1 year

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.

    The 1% for the Planet® Impact Fund at National Philanthropic Trust offers a unique philanthropic opportunity to drive positive change for our planet and future generations.
    icon representing Environmental criteria factor Enviro

    This brand uses renewable energy sources such as solar, wind, or hydro power to run its operations.

    This brand offers repair services or programs to extend the life of its products and reduce waste.

    This brand supports initiatives to protect water resources and reduce water consumption.
    icon representing Governance criteria factor Governance

    A label that describes what it takes to make an individual product. More than just a materials listing, this includes water usage, energy consumption, cost breakdown, carbon footprint, certifications, and maybe more
    icon representing item origin Origins
    Made in Sri Lanka
    97
    in Boys' Athletic Base Layers

    Patagonia Patagonia Kids' Capilene Midweight Baselayer Bottoms

    $39.00 Shop now launch
    View description
    Our Patagonia Kids Capilene Midweight Bottoms are made of 100% recycled polyester fabric with HeiQ Fresh durable odor control.

    Scored Product Attributes

    97
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Recycled Polyester

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.

    This CERT verifies that products meet Fair Trade standards, ensuring ethical sourcing, fair wages, safe working conditions and environmental sustainability throughout the supply chain.

    This CERT verifies that textiles are produced with minimal environmental impact, focusing on safe chemical use, resource efficiency and worker safety as set by Bluesign.
    Warranty: 1 year

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.

    The 1% for the Planet® Impact Fund at National Philanthropic Trust offers a unique philanthropic opportunity to drive positive change for our planet and future generations.
    icon representing Environmental criteria factor Enviro

    This brand uses renewable energy sources such as solar, wind, or hydro power to run its operations.

    This brand offers repair services or programs to extend the life of its products and reduce waste.

    This brand supports initiatives to protect water resources and reduce water consumption.
    icon representing Governance criteria factor Governance

    A label that describes what it takes to make an individual product. More than just a materials listing, this includes water usage, energy consumption, cost breakdown, carbon footprint, certifications, and maybe more
    icon representing item origin Origins
    Made in Sri Lanka
    62
    in Boys' Athletic Base Layers

    REI REI Co-op Lightweight Crew Long Underwear Top - Kids' | REI Co-op

    $29.95 Shop now launch
    View description
    Start layering your littles with the kids' warm, breathable REI Co-op Lightweight Crew Long Underwear top. It features a made-to-move design and all of the comfy for a day of play.

    Scored Product Attributes

    62
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    UPF 50+

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT verifies that products meet Fair Trade standards, ensuring ethical sourcing, fair wages, safe working conditions and environmental sustainability throughout the supply chain.

    This CERT verifies that textiles are produced with minimal environmental impact, focusing on safe chemical use, resource efficiency and worker safety as set by Bluesign.
    Warranty: 45 - 90 Day

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.
    icon representing Environmental criteria factor Enviro

    This brand offers return, trade-in or buy-back programs for its own or industry products to encourage product reuse and reduce waste.

    This brand participates in carbon offset programs to neutralize its carbon emissions.
    40
    in Boys' Athletic Base Layers

    Burton Snowboards Kids' Carbonate Layering Pants | Burton.com Winter 2023

    $64.95 Shop now launch
    View description
    Shop the Kids' Carbonate Layering Pants and other snow pants, bibs, and apparel from Burton.

    Scored Product Attributes

    40
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.
    Warranty: Lifetime

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.

    Standards ensuring that animal derived materials used in the products come from animals that were treated humanely

    Standard or process for ethical and legal operations that a brand requires its suppliers to follow
    icon representing Environmental criteria factor Enviro

    This brand participates in programs that upcycle, repurpose, or utilize deadstock materials to create new products.

    This brand participates in carbon offset programs to neutralize its carbon emissions.
    40
    in Boys' Athletic Base Layers

    Burton Snowboards Kids' Base Layer Tech T-Shirt | Burton.com Winter 2023

    $44.95 Shop now launch
    View description
    Shop the Kids' Base Layer Tech T-Shirt and other fleece, sweaters, and shirts from Burton.

    Scored Product Attributes

    40
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.
    Warranty: Lifetime

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.

    Standards ensuring that animal derived materials used in the products come from animals that were treated humanely

    Standard or process for ethical and legal operations that a brand requires its suppliers to follow
    icon representing Environmental criteria factor Enviro

    This brand participates in programs that upcycle, repurpose, or utilize deadstock materials to create new products.

    This brand participates in carbon offset programs to neutralize its carbon emissions.
    35
    in Boys' Athletic Base Layers

    Muddy Puddles Thermal Baselayer Bottoms

    £20.00 Shop now launch
    View description
    Autumn and winter adventures will be even more fun for your kids with these super cosy Muddy Puddles Drift baselayer bottoms. Cosiness and comfort start with layering, so wearing thermal base layers is the best solution for outdoor adventures in the cold

    Scored Product Attributes

    35
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications

    This CERT recognizes businesses that meet high standards of social and environmental performance, accountability and transparency as certified by B Lab.
    Warranty: 1 year
    8
    in Boys' Athletic Base Layers

    Shred Dog Foundation Kids' Baselayer Bottom

    $34.00 Shop now launch
    View description
    Kids base layer long underwear pant with super soft, moisture-wicking, stretch fabric. Perfect thermals for kids providing extra warmth under ski snowboard pants or any other pants on cold days.

    Scored Product Attributes

    8
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Limited Lifetime
    8
    in Boys' Athletic Base Layers

    Shred Dog Foundation Kids' Baselayer Top

    $40.00 Shop now launch
    View description
    Super soft, durable, and moisture-wicking, this thermal shirt for kids is the perfect first layer in cold weather and just a comfy longsleeve shirt to wear any time.. Perfect for kids skiing, snowboarding, hiking, mountain biking, or just playing outside in cold weather.

    Scored Product Attributes

    8
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Limited Lifetime
    8
    in Boys' Athletic Base Layers

    Shred Dog Boys Seamless 1/4-Zip Baselayer Top

    $44.00 Shop now launch
    View description
    Combining seamless design with Nilit Heat performance fibers, SHRED DOG's new baselayer top provides the warm, anti-microbial, moisture-wicking foundation to keep your kids warm, dry and comfortable on the mountain and year-round.

    Scored Product Attributes

    8
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Limited Lifetime
    8
    in Boys' Athletic Base Layers

    Obermeyer Teen's UltraGear 1/4 Zip

    $59.00 Shop now launch
    View description
    Teens Ultragear Zip A flexible baselayer made to move with your body. Built for warmth and comfort, our Ultragear Zip provides the foundation for your winter setup. A zip closure and chin protector offer wind protection, while elastane knit construction creates dynamic flexibility.

    Scored Product Attributes

    8
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Limited Lifetime

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.
    8
    in Boys' Athletic Base Layers

    Obermeyer Teen's UltraGear Bottom

    $49.00 Shop now launch
    View description
    Teens Ultragear Bottom The perfect foundation for your winter setup. The Ultragear Bottom is designed to provide dynamic movement and base protection on your best adventures. Flat seam construction creates a sleek, comfortable fit, while an elastic waist keeps your baselayer snug.

    Scored Product Attributes

    8
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Limited Lifetime

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    Company participates in community outreach or activism programs.
    6
    in Boys' Athletic Base Layers

    icebreaker Merino 200 Oasis Long Sleeve Crewe Thermal Top

    $60.00 Shop now launch
    View description
    A reliable go-to kids base layer for cold-weather warmth and everyday layering, the 200 Oasis Long Sleeve Crewe keeps young adventurers warm and comfortable from the ski hill to the school bus. Made from 100% merino wool jersey fabric, the Oasis is super soft next to the skin, naturally breathable and odor-resistant, with a fit that offers comfort and range of motion.

    Scored Product Attributes

    6
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: 1 year
    6
    in Boys' Athletic Base Layers

    icebreaker Merino 260 Tech Thermal Leggings

    $70.00 Shop now launch
    View description
    A warmer midweight version of our best-selling Oasis Leggings, sized for kids and perfect for frigid days on the trails or the slopes, the 260 Tech Leggings feature an 100% merino wool fabric for premium softness, insulation and breathability. These odor-resistant baselayer bottoms also feature an updated design with a comfy brushed waistband, a gusseted construction for ample range of motion, and flatlock stitching throughout to eliminate chafing.

    Scored Product Attributes

    6
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: 1 year
    6
    in Boys' Athletic Base Layers

    icebreaker Merino 200 Oasis Thermal Leggings

    $60.00 Shop now launch
    View description
    Our go-to lightweight kids base layer bottoms for milder winter days and year-round layering, the 200 Oasis Leggings provide the natural benefits of merino wool with a design that offers comfort and range of motion. The 100% merino wool jersey fabric insulates during frigid family hikes or days on the ski hill, and it breathes efficiently on warmer days. The Oasis Leggings also feature a gusseted construction and flatlock seams for chafe-free, unrestricted movement.

    Scored Product Attributes

    6
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: 1 year
    5
    in Boys' Athletic Base Layers

    Helly Hansen Home Page - EN

    $80.00 Shop now launch
    View description
    The best kids’ base layer on the market uses a clever 2-layer construction to keep active kids dry and warm. Our Lifa® technology wicks away moisture while merino wool creates breathable warmth

    Scored Product Attributes

    5
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    Recycled Content

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Over 1 - 2 Year

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    This brand offers discounts for first responders, including police, firefighters, and EMTs.

    This brand offers discounts for medical professionals to support their contributions to healthcare.

    This brand provides discounts for active military members and veterans.
    5
    in Boys' Athletic Base Layers

    Smartwool Kids' Merino Wool 250 Base Layer Crew | Smartwool

    $60.00 Shop now launch
    View description
    Keep kids comfortable and warm with our super soft Merino base layer crew that doesn't hold odor and is ideal for skiing or hanging at the campground.

    Scored Product Attributes

    5
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Over 1 - 2 Year
    4
    in Boys' Athletic Base Layers

    Helly Hansen Kids' HH LIFA® Merino Base Layer Set

    $75.00 Shop now launch
    View description
    The best kids’ base layer on the market uses a clever 2-layer construction to keep active kids dry and warm. Our Lifa® technology wicks away moisture while merino wool creates breathable insulation.

    Scored Product Attributes

    4
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Over 1 - 2 Year

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    This brand offers discounts for first responders, including police, firefighters, and EMTs.

    This brand offers discounts for medical professionals to support their contributions to healthcare.

    This brand provides discounts for active military members and veterans.
    4
    in Boys' Athletic Base Layers

    Smartwool Kids' Merino 250 Base Layer Bottom | Smartwool

    $60.00 Shop now launch
    View description
    Now your kids can be as warm, dry and comfortable as you with these Merino kids' base layer bottoms, which are perfect for layering on a cold ski day.

    Scored Product Attributes

    4
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Over 1 - 2 Year

    Good To Know - Brand Attributes

    icon representing item origin Origins
    Made in Vietnam
    4
    in Boys' Athletic Base Layers

    Smartwool Kids' Merino Wool 250 Base Layer Zip T | Smartwool

    $65.00 Shop now launch
    View description
    With soft, breathable Merino, kids stay comfortable and warm all day on the mountain in this Zip T shirt that's easy to layer and washable.

    Scored Product Attributes

    4
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Materials

    Merino Wool

    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: Over 1 - 2 Year

    Good To Know - Brand Attributes

    icon representing item origin Origins
    Made in Vietnam
    1
    in Boys' Athletic Base Layers

    Under Armour Access to this page has been denied.

    $40.00 Shop now launch
    View description
    We all hate it. That stiff, distracted feeling you get when you're out in the cold. That's why, we built a baselayer that keeps you warm and dry without being bulky or riding up, so you can stay focused all season long.

    Scored Product Attributes

    1
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: 45 - 90 Day
    1
    in Boys' Athletic Base Layers

    Spyder Web Half Zip T-Neck - Volcano (Red) - Boys | Spyder

    $59.00 Shop now launch
    View description
    One of the coolest things about throwbacks is that for new school kids, old school isnt a throwback at all. The Boys Web Half-Zip features a spider web graphic across the torso reminiscent of the Spyder of the early to mid-2000s.

    Scored Product Attributes

    1
    icon representing Social criteria factor icon representing Enviro criteria factor icon representing Quality criteria factor Certifications
    Warranty: 20 - 34 Day

    Good To Know - Brand Attributes

    icon representing Social criteria factor Social

    This brand offers discounts for first responders, including police, firefighters, and EMTs.

    This brand provides discounts for active military members and veterans.

    This brand offers discounts for teachers and educators to support their contributions to education.

    This brand offers discounts for students.
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