The Save Phace 3011612 MO2 40-vizl2 Series welding helmet weighs about 23 oz. It has better airflow than any other helmet. This helmet has awesome graphics. The ADF features: internal adjustments, 2 sensors, fully automatic, grind mode, sensitivity, delay controls, grind Flash indicator and low battery warning. This helmet has a lower profile than any other helmet in the world. It is made of high heat Nylon. It a light state it is shade 4 and in a dark state it is adjustable from shades 9-13. This helmet includes 2 bonus flex fit front pocket lenses. There is a 24 month warranty on the ADF filter.World’s largest viewing area of over 40 sq. Inches World’s 1ST and only 4″x4″ ADF integrated into a 180 Degree welding lens World’s fastest Protective lens change system New articulating multi point adjustabe halo headgear Cheater lens compatible World’s largest viewing area of over 40 sq. Inches World’s fastest Protective lens change system New articulating multi point adjustabe halo headgear Cheater lens compatible