Swimwear that gets you there. Reach your goals in our sporty blue muscleback, featuring an understated reverberating boom logo graphic. The classic muscleback style offers flexibility and freedom of movement during your workout. Cut from chlorine-resistant enduraflex fabric with 4-way stretch and shape-retaining creora® highclo'. Body made of 80% nylon and 20% elastane (creora® highclo).