Skip to main content
Hi !Hi! Sign in or registerDaily DealsBrand OutletGift CardsHelp & Contact
Sell
Watchlist
My eBay
  • Summary
  • Recently Viewed
  • Bids/Offers
  • Watchlist
  • Purchase History
  • Buy Again
  • Selling
  • Saved Feed
  • Saved Searches
  • Saved Sellers
  • My Garage
  • Sizes
  • My Collection
  • Messages
  • PSA Vault
Please sign-in to view notifications.
Loading...
eBay Home
Advanced
Sponsored
Sponsored
Sponsored

Filter

    • Category

      • Boys' Clothing (Sizes 4 & Up)
        • Selected categoryUnderwear
      • Size

        XSFilter AppliedSMLXL2XL44-55-66-7812141618One Size
      • Theme

        • Royal (10) Items (10)
          Filter Applied
        • Colorful (152) Items (152)
        • Classic (103) Items (103)
        • Sports (46) Items (46)
        • Logo (38) Items (38)
        • Cartoon (36) Items (36)
        • Cartoon, TV & Movie Characters (30) Items (30)
      • Material

        • Cotton (9) Items (9)
        • Polyester (9) Items (9)
        • Cotton Blend (6) Items (6)
        • Fabric (5) Items (5)
        • Polyester Blend (5) Items (5)
        • Not Specified (1) Items (1)
      • Features

        • Breathable (8) Items (8)
        • Stretch (7) Items (7)
        • Lightweight (6) Items (6)
        • Tagless (5) Items (5)
        • Moisture Wicking (2) Items (2)
        • Not Specified (2) Items (2)
      • Country/Region of Manufacture

        • India (5) Items (5)
        • El Salvador (1) Items (1)
        • Not Specified (4) Items (4)
      • Number in Pack

        • 1 Pack (1) Items (1)
        • 2 Pack (2) Items (2)
        • Not Specified (7) Items (7)
      • Style

        • Long Johns (9) Items (9)
        • Not Specified (1) Items (1)
      • Brand

        • Athletic Works (10) Items (10)
      • Color

        • Black
        • Blue
    • Price

      $
      to
      $
      Please provide a valid price range
      Available inventory
      $0
      $1000+
    • Condition

      • New with tags (10) Items (10)
    • Buying Format

    • Item Location

      • Within25 mi
    • Shipping and pickup

      • Arrives in 2-4 days
      • Free Shipping
      • Local Pickup within25 miles
    • Show only

      • Free Returns
      • Returns Accepted
      • Authorized Seller
      • Completed Items
      • Sold Items
      • Deals & Savings
      • Authenticity Guarantee

10 results

  • All
  • Auction
  • Buy It Now
  • All Listings- Filter Applied
  • Auction
  • Buy It Now
  • Any Condition- Filter Applied
  • New with tags
  • Arrives in 2-4 days
  • Free Shipping
  • Best Match
  • Time: ending soonest
  • Time: newly listed
  • Price + Shipping: lowest first
  • Price + Shipping: highest first
  • Distance: nearest first
  • List View
  • Shop on eBay
    Shop on eBay
    Opens in a new window or tab
    Brand New
    $20.00
    or Best Offer
    Sponsored
  • Shop on eBay
    Shop on eBay
    Opens in a new window or tab
    Brand New
    $20.00
    or Best Offer
    Sponsored
    • XSRemove filter
    • RoyalRemove filter
    • Clear AllFilters
    • Athletic Works Blue Boys Thermal Underwear Set XL (14-16)
      Athletic Works Blue Boys Thermal Underwear Set XL (14-16)
      Opens in a new window or tab
      Brand New
      $14.59
      Buy It Now
      Free delivery
      Sponsored
    • Athletic Works Youth Boys Navy Waffle Thermal Underwear Incl 2 Pieces Sz 4/5 NEW
      Athletic Works Youth Boys Navy Waffle Thermal Underwear Incl 2 Pieces Sz 4/5 NEW
      Opens in a new window or tab
      Brand New
      $11.49
      or Best Offer
      +$4.62 delivery
      Sponsored
    • Athletic Works Blue Boys Thermal Underwear Set XXL (18)
      Athletic Works Blue Boys Thermal Underwear Set XXL (18)
      Opens in a new window or tab
      Brand New
      $14.59
      Buy It Now
      Free delivery
      Sponsored
    • Athletic Works Boys Youth XS 4-5 Thermal Underwear Set Warm Royal Blue New Pkg
      Athletic Works Boys Youth XS 4-5 Thermal Underwear Set Warm Royal Blue New Pkg
      Opens in a new window or tab
      Brand New
      $12.00
      or Best Offer
      +$7.35 delivery
      Save up to 10% when you buy more
      Sponsored
    • Athletic Works Youth Boys Royal/Black Crossdye Thermal Underwear Set Sz. XS(4-5)
      Athletic Works Youth Boys Royal/Black Crossdye Thermal Underwear Set Sz. XS(4-5)
      Opens in a new window or tab
      Brand New
      $7.00
      Was: $10.0030% off
      Buy It Now
      +$5.24 delivery
      Extra 10% off with coupon
      Sponsored
    • Athletic Works Youth Boys Light Royal Blue Thermal Underwear Set Size XS (4-5)
      Athletic Works Youth Boys Light Royal Blue Thermal Underwear Set Size XS (4-5)
      Opens in a new window or tab
      Brand New
      $10.99
      or Best Offer
      +$4.50 delivery
      Sponsored
    • Athletic Works Boys Thermal Waffle Underwear Set-Royal Blue-XS (4/5)-NWT
      Athletic Works Boys Thermal Waffle Underwear Set-Royal Blue-XS (4/5)-NWT
      Opens in a new window or tab
      Brand New
      $7.19
      Was: $8.9920% off
      Buy It Now
      +$6.50 delivery
      Last one
      Sponsored
    • 2x Blue Boys Thermal Underwear Set Medium (8) Athletic Works
      2x Blue Boys Thermal Underwear Set Medium (8) Athletic Works
      Opens in a new window or tab
      Brand New
      $8.99
      Was: $11.9925% off
      Buy It Now
      +$7.99 delivery
      Free returns
      Save up to 25% when you buy more
      Sponsored
    • Athletic Works Blue Boys Thermal Underwear Set XS 4-5
      Athletic Works Blue Boys Thermal Underwear Set XS 4-5
      Opens in a new window or tab
      Brand New
      $9.90
      Buy It Now
      +$5.90 delivery
      Sponsored
    • Athletic Works Blue Boys Thermal Underwear  Set XL/XG 14-16
      Athletic Works Blue Boys Thermal Underwear Set XL/XG 14-16
      Opens in a new window or tab
      Brand New
      $9.25
      Buy It Now
      +$9.25 delivery
      Free returns
      Save up to 20% when you buy more
      Sponsored
    • Tell us what you think- opens in new window or tab

    Copyright © 1995-2025 eBay Inc. All Rights Reserved. Accessibility, User Agreement, Privacy, Consumer Health Data, Payments Terms of Use, Cookies, CA Privacy Notice, Your Privacy Choices and AdChoice