Hollis M4 Mask surf The fully stainless first stage

The fully stainless first stage body has a swiveling 5-port low pressure cap

Six stainless steel D-rings (2 retractor)

Resilient silicone rubber seat

Aerodynamic

The additional light translates into improved contrast and optical clarity

Hollis M4 Mask surf The fully stainless first stageWhen choosing a mask, fit and field of vision come first. The M4 Mask gives you the best of both worlds, fitting a wide variety of faces and offering superior peripheral and vertical vision. It is low profile, stows easy and carries an excellent value. FEATURES Frameless silicon skirt Rugged mask box and adjustable mask strap included Increased vision and low volume