Ultra-lightweight construction: Reduces fatigue and enhances comfort during long runs
Guaranteed chafe-free design: Ensures irritation-free wear for all runners
No inner thigh seam and super smooth stitching: Prevents chafing and maximizes comfort
Highly breathable and moisture-wicking fabric: Keeps you cool and dry throughout the run
Fitted 3D stretch waistband: Provides secure, flexible fit for full-leg protection
Summarized by Shop
Ultra-lightweight and guaranteed chafe-free every time.
World's lightest full-leg running underwear at under 40 grams
Designed by runners - no inner thigh seam and super smooth stitching
Highly breathable and wicking to keep you cool and dry
Stay comfortable all day long with fitted 3D stretch
No chafing or your money back
Weight
Under 40 g
Material
85 gsm Italian blend (90% polyamide, 10% elastane)
Inseam
6 inches
Waistband
Performance stretch
Seamless design
No inner thigh seam
Sizing
Asian sizing (may be half a size smaller than Western sizing)
Summarized by Shop
5.0
10 ratings
5
4
3
2
1
Really comfortable and doesnt ride up on a long run
Ben · June 23, 2026
The best running undies I've worn so far
Super light weight. You get the support without feeling the tightness of the garment. perfect length to avoid chaffing. They're great for long runs. Like with the T8 trail running shorts, go one size up.
O
Olivier · May 26, 2025
These are amazing.
Did a 100km ultra in these yesterday with no chafing. I had been having issues with other shorts/liners. I’m wearing these under T8 shorts but you could wear them under any short.