It's French Terry you can actually work out in – the same comfort & warmth, but lighter & faster. Stretch-woven side & upper back panels for added mobility. Material wicks sweat & dries really fast. Encased elastic waistband with external drawcord. Secure hand pockets with right-side internal phone pocket. Inseam: 10". Secure hand pockets. Inseam: 10" (Tall 12"). No liner.