Main Fabric: 80% Nylon, 20% Spandex; Lining: 100% Polyester Elastic closure Four-way stretch technology, reinforced seams, lightweight but not translucent, fast drying UV Block fabric, UPF 50+ square leg swimsuit for men Front fully lined provieds comfortable fit, not see though when wet Suit resist chlorine for added longevity, construction built for comfort, durability and performance Elastic waistband with interior drawstring, fitted square leg, contrast dual side stripes