Women's Essence L/S Zip Top M - Mulberry/Desert Sunrise. Scramble the Devils Castle Traverse at mach speed in the breathable warmth of the Essence Long Sleeve Zip Top. Updated with new style lines, and ideal as a base layer, mid layer or stand-alone piece, the Essence is made with drirelease® merino and treated with FreshGuard® for ridge-to-town freshness.