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Under Armour

Under Armour Kids Boxer Brief Underwear (Big Kid)

  • Based on 7,977 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 13
Order within 16 hours and 21 minutes
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Size: Medium


Color: Castlerock


Description

2 Pack Solid Cotton Boxer Briefs. Fitted: a slimmer, more athletic cut. 4-way stretch fabrication allows greater mobility in any direction. Microbial wicking

Package Dimensions ‏ : ‎ 7.4 x 5.6 x 1.4 inches; 2.7 ounces


Item model number ‏ : ‎ 2 Pack Solid Cotton Boxer Briefs


Department ‏ : ‎ boys


Date First Available ‏ : ‎ July 12, 2017


Manufacturer ‏ : ‎ Under Armour Children's Apparel


Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.:


Best Sellers Rank: #17,925 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #2 in Boys' Activewear Undershorts


#2 in Boys' Activewear Undershorts:


Customer Reviews: 4.7 4.7 out of 5 stars (7,675)


Brand Name: Under Armour


Additional Features: Breathable, Lightweight, Moisture Wicking


Age Range Description: Big Kid


Unit Count: 3.0 Count


Number of Items: 3


UPC: 197571009935


Manufacturer: Under Armour


Style Number: UWSHJ23F-021


Manufacturer Part Number: UWSHJ23F-021


Item Weight: 0.02 Pounds


Item Type Name: Boxer Briefs


Color: Castlerock


Style Name: Boxer Brief Underwear (Big Kid)


Pattern: Camouflage


Rise Style: Mid


Bottom Style: Boxer Briefs


Theme: Military


Fit Type: slim


Subject Character: Sports


Material Type: Cotton Blend


Fabric Type: 57% Cotton, 38% Polyester, 5% Elastane


Product Care Instructions: Machine Wash


Apparel Fabric Weight Class: Lightweight


Apparel Fabric Stretch: High Stretch


Fit to Size Sentiment: True to Size


Garment Size Country: United States


Size: Medium


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • U.A.
Size: X-Large Color: Black/White Logo Print
Fit well, made well he says they are comfortable.
Reviewed in the United States on March 29, 2026 by Tennille Mcfarland
    • Great quality and comfort
Size: Large Color: Black/Gray Camo
My second time ordering this! The comfort and quality of this is spot on! The size is accurate and the style is something my son enjoys. It is breathable and durable enough for him to want to wear for all his baseball games.
Reviewed in the United States on June 1, 2025 by Happy Apple Teacher
    • Best boxers!
My son, like so many I am reading about, is quite picky about his clothing these days (11 years old and a full on “tween”)...and that includes underwear. Now, these are pricey but actually not even too bad when you factor in the price divided by number of pairs, and bottom line: they are worth the money. They are high quality, breathable, and comfortable. Wear and wash well, and come in nice masculine yet fun kid-approved styles, too. (We bought solids but also ones with pizza, hot dogs, and even bacon and eggs on them, which my kid just loves - lol!) They are true to size and my son has been able to wear the M size for close to a year and still going, for reference being about 4’10” or 4’11” by now and 85-ish pounds of stocky, tall boy. They fit him perfectly and are ALL he wears. Stock up here as Amazon offers them the cheapest. They really are that good! ... show more
Reviewed in the United States on April 7, 2021 by BCK1988
    • The only undies my teenager son will wear!
Size: Large Color: Castlerock Gray
My teen son will only wear these underwear. They are durable and hold up to washing and drying. They fit well and are comfortable and keep him cool. Material is breathable and stretchy. Will be buying more as he grows!
Reviewed in the United States on July 23, 2025 by Molly
    • Perfect
Size: Large Color: Black/Gray Camo
Fit my 16-year-old son perfectly says they’re soft and really likes them he’s a size 29 waist
Reviewed in the United States on April 18, 2026 by Amazon Customer
    • Comfortable and Stylish: Under Armour Boys Charged Stretch Boxer
Size: Small Color: Red/Black Print
I recently purchased the Under Armour boys Charged Stretch Boxer Jock for my son, and I must say, it has exceeded my expectations. The first thing that stood out to me was the perfect fit. It hugged my son's body comfortably without feeling too tight or restrictive. The sizing chart provided by Under Armour was accurate, ensuring that I selected the right size for him. My son, who is quite active, appreciates the comfort provided by these boxer jocks. The soft and stretchy material allows for unrestricted movement, making it ideal for sports, physical activities, or simply everyday wear. He feels at ease and supported throughout the day, which is essential for his active lifestyle. One aspect that I particularly liked is the branding placement. When my son wears pants or shorts that may ride down slightly, the Under Armour logo is subtly visible. This prevents any awkward or odd appearance, and instead, adds a touch of style and authenticity to his outfit. It's a small detail, but it makes a difference in the overall look. The material of the boxer jocks is of high quality. It feels durable and has shown no signs of wear and tear despite regular use and washing. The fabric also wicks away moisture effectively, keeping my son dry and comfortable even during intense physical activities or warm weather. However, I do have a minor concern about the durability of the waistband. While it has held up well so far, I hope that it will continue to maintain its elasticity and shape over time. Overall, the Under Armour boys Charged Stretch Boxer Jock has proven to be an excellent choice for my son. The perfect fit, comfort, and visibility of the branding are standout features. Additionally, the high-quality material ensures long-lasting performance. If you're looking for comfortable and reliable underwear for an active boy, I highly recommend giving these boxer jocks a try. ... show more
Reviewed in the United States on July 3, 2023 by MBR
    • Good Underwear
Size: Medium Color: Red/Gray
My 8 year old son loves these. They are cool and comfortable for all day wear whether at school or at sports. The one drawback is that overtime the waistband has started to fold down in half, but that happens with most elastic waistbands these days it seems. I would purchase these again.
Reviewed in the United States on January 28, 2026 by Ryan
    • On our constant reorder list!
Size: Large Color: Mod Gray
My boys most comfortable undies! Totally spoiled these are the only brand he will wear that are lightweight and breathable quality
Reviewed in the United States on February 22, 2026 by Sam

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