Hollis M1 Mask

Quick answer: The Hollis M1 is a frameless single-lens mask with Saint-Gobain Diamant low-iron glass for a clear view without the green tint of standard glass. It works for scuba and snorkeling.

Fit note for bigger divers

Hollis doesn't publish a face-size rating for the M1. Do the fit test below, and if you have a broad face, compare it against our wide-fit masks.

What it does well

Low-iron glass lets more light through and shows truer color, which you notice most in low light. The frameless build cuts weight and widens your view, and the low volume makes clearing easy.

What you get

• Single Saint-Gobain Diamant low-iron glass lens
• Frameless, low-volume design
• 100% pure silicone skirt

Options

• Colors: Black, Clear

Before you buy

Hold it to your face without the strap and breathe in gently through your nose. It should stay put without pressure at your temples or nose pocket. Read How to Fit a Dive Mask. More options: Wide-Fit Scuba Masks for Larger Faces.