Designed for active swims, the new Hyperboom Butterfly Back one-piece is the latest addition to our iconic Hyperboom collection.• Made from Endurance Pro fabric with four-way stretch, it resists chlorine and pilling for lasting comfort.• Cut with classic coverage, it has a butterfly back with a keyhole cut-out for unrestricted movement. Lavable en machine. 57% Polyester, 43% Autres fibres.