Make a statement in Boom logo prints. Celebrating the Speedo brand, this sporty black Muscleback features flattering shaped side panel splices of our shattered Boom logo print in intense shades of blue and black. The muscleback design and medium leg offer flexibility and freedom of movement, so you can rock your workout in comfort. Made from our ECO Endurance+ fabric, it’s quick-drying and 100% chlorine resistant. Plus, one of the yarns in the ECO Endurance+ fabric is made from 100% post-consumer waste, such as recycled plastic bottles.