The Eco Endurance+ HyperBoom Placement Muscleback Men's Swimsuit from Speedo has been designed to offer comfort and freedom of movement. Its front lining ensures optimal coverage and increased comfort. Made from our ECO Endurance+ material, this Eco Endurance+ HyperBoom Placement Muscleback dries quickly and is 100% chlorine resistant. Additionally, part of the yarn in this ECO Endurance+ fabric is made from 100% post-consumer recycled materials, such as plastic bottles.