Under Armour Boys 3-Pack Performance Boxer Brief

|17 ratings
Item # 990497239
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Highlights

  • Boys 3-pack performance boxer briefs with 4-inch inseam featuring a mix of bold prints and versatile solid colors
  • Smooth and breathable stretch jersey fabric feels lightweight while helping wick away moisture for all day comfort
  • Supportive athletic fit with flexible waistband and stay-put legs for secure coverage that moves with him
  • Logo waistband helps keep underwear secure during activity
  • 4-way stretch construction 
  • Machine washable fabric is designed to hold its shape color and performance wear after wear
Under Armour Boys 3-Pack  Performance Boxer Brief
Under Armour Boys 3-Pack  Performance Boxer Brief
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About this item

Product details

Performance-Driven Design for Active Boys

Under Armour transforms everyday essentials with its boys’ sport boxerjock 3-pack, combining bold novelty prints and versatile solids for a fun, energetic, and athletic look. Featuring splatter-inspired graphics, playful patterns, and vibrant color pops, these boxerjocks are designed to excite and inspire active lifestyles.

Lightweight Fabric for Comfort and Movement

Crafted from a lightweight polyester and elastane jersey knit, the fabric is soft, breathable, and stretches naturally with the body. It wicks away moisture and dries quickly, ensuring cool and comfortable wear during school days, sports practice, and weekend adventures. Unlike basic cotton underwear, this performance blend maintains its shape and support, wash after wash.

Thoughtful Construction for Everyday Durability

Designed with comfort and durability in mind, these boxerjocks feature a soft elastic waistband with Under Armour branding that stays securely in place. Smooth flatlock seams reduce irritation, while reinforced stitching adds strength in high-motion areas. The streamlined silhouette offers comfortable coverage and stays put under shorts, joggers, or uniforms.

Elevating Basics with Trusted Quality

Rooted in Under Armour’s legacy of innovation, this 3-pack delivers technical fabric, durable construction, and standout design. It’s a dependable foundation layer that supports active lifestyles, enhances comfort, and provides the trusted quality families expect from a leading athletic brand.

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Specifications

    Under Armour Boys 3-Pack Performance Boxer Brief
    Key Specifications
    Number Of Pieces: 3 pack
    Fit: Stretch fit
    Waist Height: Brief
    Waistband: Elastic waistband
    Coverage: Brief
    Fly/Gusset: N/A
    Inseam: 4" inseam
    Garment Length: VARIES BY SIZE
    Garment Weight: N/A
    Size Options: S-XL
    Model Sizing Information: N/A
    Material: Polyester/Elastane Jersey Knit
    Care Instructions: Machine wash cold with like colors

Member ratings & reviews

4.8 out of 5 stars
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17 ratings14 reviews
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Showing 1-3 of 14 reviews

Apr 8, 2026
Mrspay
5 out of 5 stars
5 out of 5 stars review

Great for active boys

Under Armour Boys’ Boxer Briefs are a solid choice if you’re looking for comfort, durability, and performance for active kids. The first thing that stands out is the fabric, it’s lightweight, soft, and does a great job of wicking away moisture. This makes them especially good for sports. The fit is snug without being too tight, offering good support while still allowing for easy movement. My son said “these new underwear feel great, mom”. In terms of durability, these hold up nicely. The stitching stayed intact after washing, and the material didn't lose its shape or softness. The also run true to size of similar brands.

Incentivized Review
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Apr 3, 2026
Jojo98
5 out of 5 stars
5 out of 5 stars review

Comfortable and stylish

The Under Armour boys sport boxer jock Underwear is perfect For boys who prefer the slick sporty feel rather than the cotton. The material is 90% polyester and 10% elastane. Doesn’t stay wet very long. When I wash it, it dries very quickly in the dryer. It’s perfect for A quick wash load. The waistband is comfortable. It does have a seam, but it is smoothly sewn. It has a fun pattern on wanting the pairs and solid colors for the other two.

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Apr 16, 2026
Too Much Honey
5 out of 5 stars
5 out of 5 stars review

Wicking boxers

These boxers are a favorite of my sons! He really enjoys their fit, especially the waistband. The wicking is a great feature that this brand specifically is known for and these don't disappoint. He also really enjoys the variety of the colors within the packages.

Incentivized Review
Helpful?20WRWIBS5MMM19283204334