Arc'teryx Phase AR Bottom - Women's Phasic - 100% Polyester Imported 3" high 6" wide PHASE AR BOTTOM - A womens midweight baselayer for high output in cooler temperatures, the Phase AR Bottom is made from next generation Phasic AR. ENGINEERED FABRIC - An Arcteryx fabric engineered to provide insulation, dry quickly, and offer performance stretch, Phasic AR uses different polyester yarn structures on its interior and face to most effectively wick and disperse moisture. IMPROVED FIT - Lighter weight Phasic SL panels at the back of the knees improve thermal regulation and reduce bulk. Updated style lines and improved fit. PHASE - Quick dry base layer with excellent moisture management. For high output activities. ARC'TERYX ESSENTIALS - Versatile high performance designs for diverse activities and conditions. Durable and light.