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The M1 frameless design makes it easy to stow in a BCD pocket, so it can also be used as a back-up mask if required. Mask provides a wide field of vision with a low internal volume making it extremely easy to clear. The 100% pure silicone double feathered edge skirt and wide split style mask strap combine for a perfect seal and comfort on the face. Mask has low-profile quick-adjust buckles. The M1 Mask is available in all black, comes with a protective mask box for storage.

Visibility is the most important aspect of any dive. The M1 mask raises the bar for optical quality and distortion-free vision. This lens is an extra clear glass that 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 glasses. This makes the lens distortion-free and helps improve color and visibility in low light conditions underwater.

Hollis M1 Frameless Mask Features

• Visibility: Most Important Aspect of Any-Dive
• Optical Quality and Distortion-Free Vision
• Extra Crystal-Clear Saint-Gobain Diamant Tempered Lens
• Single Lens Design
• Saint-Gobain Diamant Glass: Valued for Attractive Appearance and Optical Qualities
• Low Iron Content Produces Higher Light Transmittance
• Reduced Green Tint Inherent in Standard Glass
• Lens Distortion Free, Improved Color and Visibility in Low Light Conditions Underwater
• Frameless Design, Easy to Stow in a BCD Pocket
• Great Back-Up Mask
• Wide Field of Vision
• Low Internal Volume, Extremely Easy to Clear
• 100% Pure Silicone Double Feathered Edge Skirt
• Wide Split Style Mask Strap
• Feathered Edge & Wide Split Strap Combined for Comfortable and Perfect Seal on Face
• Easy to Reach One-Handed Nose Pocket for Ear Equalization
• Low-Profile Quick-Adjust Buckles
• Mask Box
• Color: All Black
• Size：15*6.5cm/5.9*2.6in
• Weight：230g