The very lightweight Men's Twinskin short has a very breathable, supportive inner liner for complete freedom of movement. Great for long runs in hot weather, this short provides light muscle support during the most intense workouts. Great stretch properties in the liner fabric, combined with super light shell fabric, ensure total freedom of movement. Liner fabric breathes and moves moisture away from the body during intense activity. Lightweight synthetic fabric dries instantly. Material: Polyamide, Elastane.