Dive Rite - ES155 OD Green Mask TUSA Nylon Wrist Strap Helium as a breathing gas

Helium as a breathing gas Effects on narcosis

Patented XTIS (Extended thermal Insulating system) fully insulates the inner mechanism from the environment

Active-status NAUI Instructors designated as Instructor Trainer may direct the Staff Training Workshop (STW)

Durable YKK AquaSeal zipper provides quick

snorkelers

Dive Rite - ES155 OD Green Mask TUSA Nylon Wrist Strap Helium as a breathing gasA mask is one of the most important pieces of dive gear and we think the ES155 frameless mask is it. With exceptional visibility and superior comfort being in the forefront of the design, diving on a reef or exploring a cave or wreck couldnt be more exhilarating. The wide angle of vision provided by the single lens and by not having the frame of the mask over the nose substantially increases overall underwater visibility. Seeing clearly underwater