The Nudibranch Unisex Sun Shirt is designed with comfort and protection in mind. With a relaxed, loose fit it is the ideal shirt for all activities from boating, fishing, diving, snorkeling, or just hanging out in the sun. It provides UPF 50+ protection from harmful sun rays and is finished with flat-lock seams to increase durability and prevent chafing. The silky smooth fabric is lightweight, breathable, and engineered to be moisture wicking and quick-drying. We suggest men order their usual size for a relaxed fit or size down for a more snug fit and women size down one size from their usual size for a relaxed fit and two sizes for a more snug fit.