Designed for Training Slick and Low Friction Support, Luxtreme Fabric, sweat wicking, four way stretch, breathable Tight Fit, 21”Length Materials-Body:69%Nylon, 31%Lycra elastene These are awesome tights! I wear these tights to work out in, bike and for base layer for underneath my snowboard pants. They are very comfortable. They are compression. Lulu makes the best stuff out there. It's hard to find good men's stuff.