Crews Rattler Safety Glasses with silver nylon frame and single anti-fog indooroutdoor lens has a unique feature of head band with hook and loop closure and the ability to adjust with one hand while wearing. It has rugged polycarbonate wrap-around lens design that offers greater side impact protection and filters 99.9% U.V. rays. It features full length, non-slip TPR temple sleeves for comfort and grip, elastic strap, indirect vent and a closed cell foam seal that prevents entry of small particles and debris. Dielectric glasses with 55% VLT have interchangeable 3-position ratcheting bayonet temples and a closed cell foam lining. It meets ANSI Z87, ASNZS 1337.1,CE EN166,CANCSA Z94.3 standards and is sold as 144 pairs per pack.