The Save Phase RFP F-Series helmets feature a huge 4 X 4 shade 3-10 ADF mounted in a shade 10 passive welding lens for a whopping 40 square inches of ear to ear vision the instant your arc is struck One of the highest rated ADFs available Durable, lightweight ballistic nylon construction with a 9 way adjustable halo for the ultimate in comfort Face forming profile for tight quarters access One of the coolest looking helmets available anywhere The Save Phase RFP F-Series welding helmets feature a shade 3-10 ADF fixed into a passive shade 10 welding lens for a massive 40 square inches of 180 degree vision the moment you strike your arc. These helmets are made from a lightweight ballistic nylon, incorporate a face forming profile, and have a 9-way adjustable halo for the ultimate in comfort. And they are the coolest looking helmets on the market.