Dakine Men’s Polypro Rashguard is perfect for use by itself or under a wetsuit; use it on a cooler summer day for a little warmth and sun protection, or slip it under your suit for an extra warmth layer. Superior insulation is provided by eleven ounce polypropylene, which takes the biting edge off cold waters. 100% UV protection, flat-lock seams, and the classic Dakine logo round out the package.