IZIPIZI Baby Sunglasses, #C Milk (Age 9-36 months)TINYAPPLE IZIPIZI FW24 Sunglasses, #C Milk (Age 9 36 months) Sunglasses for 9 36 months (head circumference 40 47 cm). #c shape: square, retro, playful Polarized lenses 100% UV protection (UV 400), Category 3 Unisex, universal model Storage bag and silicon cord included in the box. The lens of a Kid's eye is permeable to UVA and doesnt become impermeable until adulthood. Therefore its necessary to protect Kids retinas with sun filters. Flex hinges