Description of Royal Robbins Coolmax Rylan S/S Crew Royal Robbins' Coolmax/cotton fabric combines the permanent moisture-wicking properties of Coolmax and a non-shiny, cotton hand. Coolmax wicks moisture away from the skin to the fabric surface to keep wearers dry and comfortable. Features: Coolmax / Cotton jersey 4.7oz jersey, 60% Coolmax polyester, 40% cotton Moisture wicking Wrinkle resistant Quick dry 1x1 rib neck trim Rotated shoulder and side seam Traditional fit