Briefs by Speedo. Details:From swimming laps to enjoying the beach, this brief is designed to work as hard as you do. Swim with confidence thanks to smooth Lycra Xtra Life fiber construction that offers incredible durability and resistance to bagging, sagging and chemicals. Built-in sun protection offers UPF 50+ to Block the Burn as you enjoy the water or sand, HIGHLIGHTS Long-lasting Quick-drying No-pinching Custom fit feel UV & UPF 50+ protection Lotion-resistant to prevent slipping 76% Nylon / 24% Spandex.