Hyperflex Adult Loose Fit Rash Guard COMFORT: A Lycra/nylon LOOSE FIT shirt for protection against rash and sunburn MULTI-SPORT: Designed for hanging on the beach or water sports including surfing, paddle boarding, windsurfing, water skiing, wakeboarding, etc WARMTH: Constructed with polyolefin which has the highest insulating capacity of any fiber for max warmth MULTIPLE USES: Wear as a standalone, with board shorts, or as an added layer under a wetsuit FLEXIBLE: A loose fit style that won't inhibit freedom of movement