The Junior Sun #D sunglasses protect a kid's eyes with category 3 lenses that block 100% of UV rays. These kids sunglasses come in a mini square shape sized for younger faces. What Our Gearhead(R) Experts Are Saying:"Kids between 5 and 10 are old enough to care how sunglasses look, so I look for a smaller square shape they pick up on their own. A pair they want to wear protects more than a better pair left in the bag."