Expedition weight insulation for cold weather sports or ample mid-layering for the more aerobically inclined. The Arcteryx Rho AR top's Power Stretch™ fleece wicks moisture away and prevents constriction. Breathable and quick drying, with wind and abrasion resistance, the Rho AR is ideal for camping, travel or sailing the seven seas. The Rho AR top has wicking layers making them great both as a warm expedition foundation or as an ideal aerobic midlayer.