Toric lens: For wide vision, Two Point adjuster, For quick fit. ‘Zero’ power Hard Coated Visior: Polycarbonate lens meets impact test requirement for face protection, High Clarity & Durability, Unique double anti-fog. 5-Strap head harness: Gives head support & even distribution of weight. Good skin comfort in tough conditions. Provide leak proof fit. Standard Thread: RD40 Thread for connection to any standard thread canister as per IS 14138 (Part 1): 1994. Use along with V-776 type Chemical Silk ABEK Organicanic Vapour, Inorganic Gases, Acid Gases & Ammonia.