Make a statement in Boom logo prints. Celebrating the Speedo brand, our streamlined black Hyperboom Muscleback swimsuit features an ethereal take on our iconic Boom logo print. The muscleback design and medium cut leg offer flexibility and freedom of movement, so you can swim in comfort. The suit is front lined for modesty and comfort. Designed to be durable and better for the environment, it features our new ECO Endurance+ fabric which is 100% chlorine resistant, quick-drying and made from 50% recycled materials.