Incorporating a triple layer design, the Aqua Nappy comprises of a soft polyester outer layer, recycled PVC middle barrier layer, and soft inner mesh layer. The reusable and eco-friendly swim nappy is made doubly secure with an adjustable Velcro sash and poppers, allowing it to be sized up from 3 months to around 30 months in age. No other layers or inserts are required – the Aqua Nappy IS the swim nappy. Just pop it on and you’re ready to go swimming. Tested and endorsed by swim schools since their launch almost 10 years ago, this multi award winning swim nappy has time and again proved the most effective solution for preventing little accidents from spoiling swimming days.KOSSN08One Size Fits Most; 3 months – 3 years! smallest waist size – approx 30 cm, largest waist size – approx 54 cm.