Important Shipping Note: U.S. sales only.

Model Number:

The ASICS ASX Brief is a seamless running brief engineered for running. It features compression paneling and an anatomical support system for added stabilization and protection during exercise.


  • Charcoal Grey (99)


  • Mostly seamless construction
  • Ribbed waistband for added stabilization
  • Compression paneling
  • ASICS' anatomical support system for protection
  • Flatlock stitch construction
  • Gusseted crotch
  • Sculpted leg opening for movement
  • Odor-reducing technology
  • Approximate waist measurements: SM/MD:31"-33", MD/LG:34"/36", LG/XL:37"-39"


  • Hydrology: (54% Nylon/37% Polypro/9% Spandex), a substantial, soft, moisture-transfer fabric that provides dryness and strategic support


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

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Customer Reviews

Comments: Very pleased overall, but am glad I went with the larger L/XL size. Very breathable and fits just right under running shorts and for races. Good support without feeling tight or restrictive..
From: Dave, Tempe, AZ, USA. September 17th 2015

Comments: Very uncomfortable. Constant wedgies that are irritating. I wanted a very short pair of compression shorts to wear with short shorts without them exposing, these I wouldn't recommend to do so.
From: Anonymous. November 9th 2014

Comments: Seamless, moisture wicking, and not too girly - all attributes of functional men's underwear. Have been using these for years: probably have bought 20 pairs. Use under bike shorts and for everyday too.
From: Steve, San Diego, CA, USA. April 23rd 2014