These sunglasses are designed for small kids and toddlers who already crave the life of adventure! Made from ultra-durable TPU materials that can be twisted and bent with no worries of breaking and paired with a fully integrated, adjustable strap that will keep them secure on the kiddo&';s noggin (you can remove the strap too if it bothersome). The strap is especially helpful with the toddlers. And like all ONE by Optic Nerve kids styles, the Snafoo features lightweight polarized lenses. Best for kids ages 5-7. a UV Rating: 100% UVA/UVB Protection a Lens Type: Polarized a Design: Active Kids a Warranty: Lifetime a Frame: Durable, Lightweight, Kids Fit