Our EZ Air Flex Grinding/Welding Headtop features a durable flip-up visor to expose a large grind shield below that maintains respiratory protection while workers can continue grinding or inspecting welds. It is made from a lightweight DuPont super tough flame-retardant nylon (only 0.58 lbs.!) that can withstand extreme cold/heat without cracking or deforming. The adjustable durable Pera-Lok locking ratcheting head gear with replaceable ultra-soft sweat band offer the wearer extreme comfort for all-day wear. It has an APF level of 25 and complies with ANSI Z87.1+, CAN/CSA Z94.3. CE certified. NIOSH Approved.