Hollis M-1 Frameless Mask Drybag Straps & Foot Pocket: Easy

Straps & Foot Pocket: Easy Donning and Doffing

The Delta 5 is the next step in a long line of remarkably reliable

Built to last with double glued seams with Secure-Lock construction

Lightweight Techno-Polymer Material for Less Cumbersome Dive

Freeze-Thaw Stable: yes

Hollis M-1 Frameless Mask Drybag Straps & Foot Pocket: EasyThis products Overview Visibility is the most important aspect of any dive. The M1 Mask raises the bar for optical quality and distortion free vision. The extra crystal clear Saint Gobain Diamant tempered glass single lens is valued for its attractive appearance and optical qualities. The low iron content produces a higher light transmittance and a reduced green tint inherent in other glass. This makes the lens distortion free and helps improve color