arena 50th Anniversary Evo Beach Boxers for men are a cool design that change from solid black to a logo print when wet. Ideal for swimming, leisure and sports activities in the pool or at the beach, this high-tech design is inspired by arena's fifty years of passion for water sports. These trunks are made from a soft and quick-drying recycled 4-way stretch fabric and have side pockets, a zipped back pocket and mesh coin pocket. The mesh inner brief features anti-chafing tape for outstanding comfort. The smart lock-lace drawcord provides an excellent fit. Side length 41.5 cm. The Global Recycle Standard is an international, voluntary, full product standard that sets requirements for third-party certification of recycled content, chain of custody, social and environmental practices, and chemical restrictions.