Designed to reduce UV exposure by using an 8 oz. 4-Way flex nylon/Spandex composite that is breathable and extremely comfortable. The flatlock -stitched seams are durable and will withstand the elements of nature. 50+ U.V. protection blocks 97.5% of harmful rays for those long days on the water. Fast drying and odor resistant material is a brilliant blue with white stitching. Heavier than most rashguards.