Don’t let your legs get cold under your pants. Thermal Tech Underwear Pants keep the chill out and the moisture off the rider with a base layer made of Warm Tack material. When riding in cold conditions, being comfortable helps fight off fatigue. The Thermal Tech pants are compression fit to reduce muscle fatigue that may stop the rider from enjoying a longer ride. Bundle up in layers to stay warm, start with Alpinestars Thermal Tech and be warm from inside to out.