MultiSport UV Guard: 80% Nylon, 20% LYCRA; UV-Ray Sun Protection-SPF 50 * Pull-up Skirt to cover your rear on the run; Side slit for full range of motion; Stay put gripper at waistband; Hidden snaps to hold race bib in place * Skirt Length (Medium): 15.5? front, 16.5? back; 3.5? zipper pocket on right side fits keys, gels, and more; Designed for Multi Sport use and beach cover up * Machine washable, line dry, no bleach