When you're a kid, being cool matters, and one thing is for sure, the Kids' Under Armour Nitro Sunglasses have got cool written all over them. They have a lens-changing system that is magnetic, so depending on the sun's mood, kids can switch them out in no time. If they accidently drop them, it's no big deal, the Nitros are constructed with ArmourSightr, making them 10 times stronger than ordinary polycarbonate lenses. Top that off with the fact that they block 100% UVA, UVB, and UVC rays, and you got yourself a deal. Features: Lenses - ArmourSightr with Multiflection coating, Imported. Size: NONE. Color: White. Gender: Male. Age Group: Kids.