Check the listing for details. Hollis M-1 Frameless Mask. Condition: New. Listed at 114.95 USD. Our eBay Store About Us Contact Us Add to Favorite Sellers Please contact us for a personalized shipping quote Hollis M-1 Frameless Mask Frameless 100% pure silicon skirt Ultra Clear Lens Wide vision and low volume Visibility is the most important aspect of any dive and the M-1 Mask raises the bar for optical quality and distortion-free vision. The lens is ultra-clear glass which 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. Features Frameless 100% pure silicon skirt Ultra Clear Lens Wide vision and low volume Product Details Category Essential Gear > Masks SKU 205.4500.07 Weight 1.0000 Color Size UPC .