Description of Arcteryx Rho AR Boot Cut The dual identity of these wicking layers makes them great both as a warm expedition foundation or as an ideal aerobic midlayer. Wicking and mobile Polartec® Power Stretch® fabric provides a comfortable and solid foundation, and superior stretch won't impede intense athletic movements. Features: Great warmth-to-weight ratio Tapered fit Waist drawcord Polartec® Power Stretch® Weight: 225g