Sunglasses with flexible wrap-around band to keep glasses in place. New flexible frames for a more comfortable fit. Adjustable with velcro closure in back. Provides 100% UVA & UVB protection. This is another TwinzGear "GREAT GEAR" pick. My twins would never leave on regular sunglasses and they often broke them at the hinges taking them on and off so much. But Flexi Specs don't have those hinges to break and my twins actually leave them on!! These are a great product and we couldn't have managed through summer without them.