Hollis M-1 Frameless Mask Regulator The socks seams are glued

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

Hoses Flexibility Reduces-Jaw Fatigue

2-Year Service Interval with Inspection

Variable Ascent Rate Indicator

For gauge boot see SKU: HLSPGBO

Hollis M-1 Frameless Mask Regulator The socks seams are gluedThis 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