Sale: $ MSRP: $


Model Number:

Under Armour believes the "most critical piece of clothing you'll put on today" is your first layer.  The Under Armour 3" Boxer Jock of the O, or Original, Series is a a quality stretch brief with high breathability and a shorter length.


  • Black (001)
  • Grey (025)


  • 3" inseam (size Medium 30-32, unstretched)
  • Wide, comfort elastic waistband
  • Articulated mesh crotch adds ventilation
  • Anti-odor technology


  • HeatGear: Body (90% Polyester/10% Elastane), a 4-way stretch material with moisture-wicking qualities to keep you dry and comfortable as you run
  • HeatGear: Front Mesh Panel (90% Polyester/10% Elastane),  an open 4-way stretch material with moisture-wicking to provide breathability

Apparel Performance Characteristics

Apparel Fit: What's this?

  • Compression
  • Fitted
  • Semi-Fitted
  • Relaxed

Temperature Range °F: What's this?

  • Cold
    • Below 30
  • Moderate
    • 30-45
    • 40-55
    • 50-65
  • Hot
    • above 65

Fabric Thickness: What's this?

  • Thin
  • Medium
  • Thick

Customer Reviews

Comments: Great performance underwear! Comfortable, breathable, and no chafing. My only complaint is the wasitband is thick and high. I use these for running and non-running simply because they feel better than traditional boxer.
From: Tyler, Outer Banks, NC, USA

Comments: Found these on sale and bought a pair. The material is super nice, really expensive feeling (10% elastane). I like that it has the hole in the front, which a lot of my sport underpants don't have.  The front panel is also mesh, which helps keep things cool down there. This is a short pant with a 3" inseam, but it's long enough to prevent chaffing.  My only small complaint is the that waistband is a bit high and thick. I don't mind it showing a bit as the black and red is nice, but it tends to fold over when moving around. That said, I went ahead and ordered a couple more while the price is low. I also ordered a couple of the longer ones too at full price. These will be my standard underpants going forward.
From: Brian, Atlanta, GA