KOOLSUN FLEX sunglasses simply offer the best fit and design for your baby, they have a removable buckle strap that can keep it from falling off the face of your baby by simply adjusting the back strap for a perfect fit for your baby. They are very comfortable and will not cause any marks on your baby's head. Besides giving protection to your baby's eyes, they are also a fashion statement. It has different complementary colors that make it stand out in a fashionable way. The frame and temple are totally FLEX(ible) and have a mix of Aqua with a Grey colour that is co-injected. The buckle is in light gray colour with a Mat finish, the strap is green. In addition, the silver mirror lenses are made of strong polycarbonate that cannot break. The lenses are certified optical class 1 and cat. 3, useful in blocking harmful UV-A and UV-B radiation 100% guaranteed. KOOLSUN FLEX sunglasses come packaged in a KOOL microfiber pouch, which you can be used for regular storage.