In keeping with the original Hornet, it's a medium fit, extremely lightweight and comfortable. The frames are flexible ensuring they wrap around the face and give maximum protection. Slim fit lenses sit seamlessly within the matt frame, giving a clean appearance and feel. Distortion free, impact resistant XTR Karbon8 optical class one polarised lenses provide maximum protection against UVA, UVB and other harmful blue light up to 400nm. Tested to BS EN ISO 12312-1:201.