Speedo swimsuits speedo girls hyperboom butterfly back swimsuit anthracite post it pink neon jelly junior training and lessons just got a bold upgrade. Designed for junior training, lessons, and active swims, the hyperboom butterfly back swimsuit is the latest addition to our iconic hyperboom collection. Made from endurance pro fabric with four-way stretch, it resists chlorine and pilling for lasting comfort and durability. The design includes classic coverage and a butterfly back for flexibility and freedom of movement. Built for the pool, session after session. Endurance pro fabric chlorine resistant butterfly back four-way stretch pilling resistant junior training 3 key features endurance pro fabric the hyperboom is made from speedo’s endurance pro fabric, engineered to hold its shape and colour through heavy pool use. Four-way stretch moves with your swimmer rather than against them, keeping the suit comfortable across every length. Chlorine and pilling resistance mean it stays looking fresh for far longer than standard swimwear fabrics. Butterfly back for freedom the butterfly back construction is specifically chosen to give junior swimmers maximum shoulder and arm mobility during training and lessons. It keeps straps secure without restricting the range of motion needed for developing stroke technique. Whether drilling freestyle or working on backstroke, the design stays out of the way. Classic coverage and front lining classic coverage provides a confident, secure ...