Built for active layering, this undershort uses Heathered VentX fabric with 4-way stretch and moisture-wicking properties to keep you comfortable during high-output activity. Flatlock seams lie flat against the skin and eliminate chafing, while the no-inseam construction maximizes freedom of movement. An elastic waistband delivers a semi-snug, secure fit, and the fabric is UPF-rated to block 94% of UVA and UVB radiation.