As a worthy successor to the Looping, the Loop M retains the proven concept of a reversible, hinge-free frame, providing children with a pleasantly flexible and comfortable pair of glasses that fits perfectly to any face shape. With its enclosing, rounded shape, complete coverage, and high-quality Spectron 4 lenses, it guarantees optimal protection. The frame is also made from unpainted, hypoallergenic material. With the Loop M, Julbo has created sunglasses that safely protect the eyes of the youngest and that they truly enjoy wearing. The material is polycarbonate.