Julbo's Spectron lenses offer high definition vision, superior optical quality and optimum transparency. Light and unbreakable, they also display lasting strength and resistance to solvents. Looping sunglasses are more than lens; these sun protective glasses are designed with your child’s sun-health and eye protection in mind, the flexible wrap frames and comfort strap guarantee absolute comfort. Spectron polycarbonate lenses. All sunglasses include a carry case. Comes with extra flat elastic cord for adjustable fit. The lens also provides 100% protection against UVA, B and C.