This EZ Air Max Welding Headtop w/ ADF lens and airduct headgear assembly is incredibly lightweight at only 1.8 lbs! The large design accommodates safety glasses under the face shield and is perfect for general welding applications. It is made from DuPont super tough flame retardant nylon that can withstand extreme cold and heat without cracking or deforming. The flame retardant shroud covers wearers neck, ears, and back of the head to prevent arc burns. Includes comfortable Pera-Lok ratchet headgear that wont wear out like all other brands. Also comes with an ultra-soft replaceable headband that conforms to the shape of your forehead for added comfort. Perfectly balanced for all day use. The 9936-7500VX ADF lens has a 2.4 in x 3.9 in viewing area; UV/IR up to shade 16 with a permanent outer coating to protect eyes; three light shade modes and Solar Cell primary battery with digital Lithium powered backup which lasts 5-10 years.