skip to main content
Press space bar to activate this search field.
Hello!
Join myAcademy RewardsSign In
Hot Deals
Clearance
New at Academy
Trending Shops
Trending Brands
Shirts + Tops
Bottoms
Shoes + Boots
Shoes By Sport
Workwear
Outdoor Clothing
Active Clothing
Accessories
All Clothing
Top Brands + Trending
Shirts + Tops
Bottoms
Shoes + Boots
Shoes by Sport
Active Clothing
Outdoor Clothing
Accessories
Workwear
All Clothing
Top Brands + Trending
Boys' Clothing
Girls' Clothing
Kids' Shoes
Shoes By Sport
Kids' Accessories
Sports Equipment
Fun + Play
Trending + Top Brands
Men's Shoes
Women's Shoes
Boys' Shoes
Girls' Shoes
Shoes by Sport
Boots
Top Brands
Socks + Accessories
Shoes on Sale
    Hunting
    Firearms + Ammo
    Fishing
    Camping + Hiking
    Boating
    Water Bottles + Tumblers
    Coolers
    Knives + Self Defense
    Featured
    Handguns
    Rifles
    Shotguns
    Ammo
    Gun Storage + Safety
    Featured Brands
    Optics + Scopes
    Gun Accessories
    Gun Deals
      Baseball
      Softball
      Basketball
      Golf
      Football
      Soccer
      Tennis + Racquet Sports
      More Sports
      Trending
      Outdoor Living
      Grills + Outdoor Cooking
      Tailgating
      Outdoor Toys
      Game Room
      Sunglasses
      Bikes + Cycling
      Pools
      Trending
      Strength Training
      Cardio Equipment
      Running Essentials
      Yoga
      Fitness Accessories
      Cross Training Equipment
      Wellness and Recovery
      Performance + Metabolic Supplements
      Trending
      MLB
      NCAA
      Soccer
      NBA
      NHL
      NFL
      Fan Shop Brands
      Collections
      Tailgating
      Main content starts here.

      Boys' Thermal Underwear

      10 items
      10 items
      Struck through filters are unavailable with current selections
      Magellan Outdoors Youth Thermal Waffle Baselayer Set
      Now priced between $13.99 and $19.99. Regularly priced between $19.99 and $19.99.

      Magellan Outdoors Youth Thermal Waffle Baselayer Set

      (22)
      Now priced between $13.99 and $19.99. Regularly priced between $19.99 and $19.99.
      Magellan Outdoors Youth Thermal Stretch Long Sleeve Crew Baselayer Top
      Now priced between $20.99 and $29.99. Regularly priced between $29.99 and $29.99.

      Magellan Outdoors Youth Thermal Stretch Long Sleeve Crew Baselayer Top

      (12)
      Now priced between $20.99 and $29.99. Regularly priced between $29.99 and $29.99.
      FREE SHIPPING
      Magellan Outdoors Boys' HuntGear Heavy Weight Baselayer Bottoms
      $21.99
      Magellan Outdoors Boys' HuntGear Heavy Weight Baselayer Crew Neck Top
      $21.99
      Academy Deal Days. 30% off Clothes + Shoes. 20% off Sports + Outdoors. Online Only. Limited Time. Discount applied in cart. Exclusions apply.
      Under Armour Boys' ColdGear Armour Long Sleeve T-Shirt
      $40.00
      +1
      Rawlings Boys’ Premium Slider Shorts
      $19.99
      Under Armour Boys' ColdGear Mock Neck Long Sleeve Shirt
      $40.00
      +1
      Under Armour Youth Utility Slider 21 Baselayer
      $29.99
      Under Armour Youth Utility Cup 21 Slider Baselayer
      $34.99
      Magellan Outdoors Youth Thermal Stretch Baselayer Pants
      Now priced between $20.99 and $29.99. Regularly priced between $29.99 and $29.99.

      Magellan Outdoors Youth Thermal Stretch Baselayer Pants

      (12)
      Now priced between $20.99 and $29.99. Regularly priced between $29.99 and $29.99.
      FREE SHIPPING

      Related Categories

      Your Feedback Matters!