These Kid's Nike Swim Easy Fit Sport Goggles are perfect for young athletes. Because youngsters come in all sizes, they have a stretch strap for creating a quick and easy fit. The frame of the swim goggles is flexible and the angled strap design distributes even pressure - a combination that provides maximum comfort. Stretch Strap enables a quick and easy fit Soft, Flexible Frame enhances comfort for little swimmers. Angled Strap Design distributes pressure evenly for maximum comfort. 80% Silicone, 20% Polycarbonate.