The Arcteryx Rho AR Top is made of moisture wicking Polartec Power Stretch fabric and is designed for outdoor aerobic activity. Its form fitting design helps maximize comfort and mobility. The versatile Rho AR Top can be worn on its own or as a midweight layer during alpine adventures like mountaineering and skiing. Laminated zip pockets keep essentials at bay and help round out the Rho AR from Arcteryx.