Commercial divers best choice, Special Corps Mask of choice, a mask that can withstand the toughest and most frequent use possible.

Features
Regulator cover in marine-use Anodized Anticorodal®, light weight
resistant, durable aluminum.
Reg adjustment knob, internal screw, in AISI 316 stainless steel.
AISI 316 stainless steel frame and buckles.
Sensitive reg adjustment knob, sturdy and easy to grab even
wearing thick gloves.
Glacier strap: HNBR rubber made head strap, designed to maintain
high elasticity when exposed to very low temperatures.
1030 g total mask weight (2.28 lb.).
Heavily reduced positive buoyancy, 232 g (0.5 lb.).

Cold water certified, balanced, on demand, integrated regulator.
Polycarbonate visor (siloxane double coated for scratch resistance).
Directional exhaust valve (4 positions).
Dive / pre dive switch.
Limited LIFETIME warranty!
SAV (Surface Air Valve) included. 

!! Cannot mount Extender Frame and Kit unless clamping band is switched to nylon!!