The North Face Womens Freedom Insulated Simple Alp Pants are snowsports pants that offer stylish mountain performance. Uncomplicated design with effective construction & materials has yielded a ski pant that is rugged weather proof both waterproof & breathable & insulated with 60g Heatseeker Eco. Mesh gussets are part of the Chimney Venting system that draws fresh in through the Stretch Vent gaiter & moves hot up & out to keep you thermally balanced.