The endurance athlete of insulating layers , the Rho AR Bottom is designed for constant, measured activity in super cold weather. During frigid conditions wear the Rho as a base-layer, or sport it as a standalone piece when it's cold but not freezing. Either way, you'll appreciate the plush interior that stays incredibly warm on your legs while improving your thermal efficiency. The next-to-skin fit and elasticized Polartec Power Stretch stay in constant contact with your body, transporting moisture away from your legs so you stay warm and dry while your friends experience the soggy reality of lesser materials. If you do choose to use the Rho AR Bottom as an outer layer, the zippered thigh pocket keeps chapstick or other small essentials within' easy reach, meaning you don't have to stop moving to keep your lips from getting shredded. Enjoy the quick-drying insulation of the Rho AR Bottom and unleash your winter activity potential.