Hollis M-1 Frameless Mask Regulator Great back-Up Mask

Great back-Up Mask

2MM nylon/smoothskin warm collar with vented neck drain provides an improved seal with the BARE dry hood

Variable Ascent Rate Indicator

The socks seams are glued and blind stitched for strength and comfort

butt-plate rails can be difficult to access if back-mounted gear covers them-up

Hollis M-1 Frameless Mask Regulator Great back-Up MaskThis 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