UV400 protection coating blocks 100% harmful UVA & UVB rays, restores true color, protecting eyes perfectly. Flexible metal spring hinges to enhance your wearing comfort, making the arms fit your head size and face shape better. Highly polished metal alloy frame materials, smoothed edge, soft silicone nose pads, perfect lightweight stylish sun shades. Round metal frame Hippie halloween costume glasses, you can also wear them for outdoor activities.