Speedo Women's Hyperboom Splice Muscleback Swimsuit Swimming Costume Teen Girls Swimwear Swimwear for Teenage Girls Speedo Australia Speedo girls' hyperboom splice muscleback one piece swimsuit Speedo girls' hyperboom splice muscleback one piece swimsuit Girls' HyperBoom Splice Muscleback Swimsuit Navy Red Speedo UK. Speedo Girls Hyperboom Printed Muscleback One Piece with; Round neckline Quick drying Contrasting printed side panels Fits like new for longer with CREORA HighClo Muscleback strap design allowing for a full range of motion Shape retention with fabric stretching and constricting with each movement Made from: 80% Polyamide 20% Elastane (Endurance 10) *This swimsuit is not suitable for commercial pools. Please see chlorine resistant styles here.