This light-weighted bulletproof helmet meets NIJ Level IIIA standards. Features: Ballistics tested by Chesapeake to NIJ Level IIIA Durable and water/chemical/UV resistant Secured to position using ergonomically designed locking system that's easy to adjust, convenient, and secure Using OCC-DIAL adjustable belt to adjust the size to exactly match your head and make you more comfortable Internal cushion, for added comfort and security, made of impact-absorbing form and memory form that creates impact buffer as well as is breathable and resistant to environmental factors (such as temperature/humidity/elevation changes). Designed to fit noise-cancelling headsets and other communication equipment easily inside the helmet External rail provides flexibility for additional equipment Weight: 3.3 Lbs Size Chart: Large: 22.5" To 23.4" - X-Large: 23.5" To 24.2" Imported NO REFUNDS OR EXCHANGES FOR BALLISTIC PRODUCTS.