Julbo's new LOOP series builds on the success of the Looping - the world's best-selling children's sunglasses. Julbo LOOP M sunglass frames are designed for kids ages 1-3 years. They are built out of hypoallergenic and paint free materials. Spectron polycarbonate category 4 lenses block 95% of the visible light and offer 100% UV protection from A, B and C rays. They're light, comfortable, and tough enough for anything . The LOOP M is fully reversible and the adjustable strap keeps them snug on your kids face.