Ideal as undergarment or by itself for superior UV protection • Cool lightweight material • Flat seam construction for comfort • UPF protection 50 Characterized by the Mares Trilastic look, the rash guard is built with a material that provides UPF protection of 50 . The seams, sewn with flatlock stitching, won’t leave marks on your skin. Perfect to wear underneath your suit and ideal for all kinds of watersports.