Swimwear that gets them there. Watch them fly through training wearing our sporty black muscleback swimsuit with a subtle boom logo graphic. Flexibility and freedom of movement come as standard with the sporty muscleback design, which is ideal for training. Body made of 80% nylon and 20% elastane - creora® highclo. Body made of 80% nylon and 20% elastane - creora® highclo. Enduraflex:with high chlorine resistance and 4 way stretch-fits like new for longer with creora® highclo'. Muscleback design offers flexibility and freedom of movement, so you can swim in comfort