Spectacle with extra frame and headband. Permanent Supravision Extreme "spread-coating" which means extremely scratch resistant outside, and permanently free of fog inside, when it never reaches the saturation point. UV 400 filter. Suitable in enviromnent with dust, and in combination with dust mask. Weight 31 gr. Contain a box of 4 pcs. Carton: 32 boxes of 4 pcs.