Fit & Design: Relaxed fit pants Regular rise – Sits below the natural waist The breathable knit fabric has a super stretchy feel for more effortless movement Elastic waistband with drawcord for an adjustable, comfortable fit Zippered side pockets help keep your essentials secure A center back pocket has a soft hook-and-loop closure for extra comfort while seated Ribbed cuffs keep the hems in place Technology: Nike Therma-FIT ADV technology combines heat-regulating fabric with advanced engineering and features to help keep you warm in cold-weather conditions Additional Details: Machine wash Meet the Axis Performance System collection—a layering system of training gear that rises to the challenge of your everyday needs. Every piece is designed to work together to get the most out of your workout in different conditions The Axis collection uses atlas mapping and data from hundreds of athletes to create gear that is made to move Designed to fit in with other pieces from the Axis System, these pants are a Level 2, meaning they can be worn over a base layer. They're perfect for low and high intensity workouts when extra warmth is needed