The Hollis M-1 mask has established itself as a top-tier choice for divers seeking exceptional optical clarity and a comfortable, low-profile design. Its frameless construction, crafted from 100% pure silicone, not only contributes to a sleek and hydrodynamic profile but also enhances durability by eliminating potential stress points found in traditional framed masks. This design allows the mask to sit closer to the face, significantly increasing the field of vision, providing divers with a truly panoramic underwater experience.   

The single lens of the M-1 is made from Saint-Gobain Diamant tempered glass, renowned for its ultra-clear properties. This high-quality glass has a low iron content, which minimizes the green tint often present in standard glass, resulting in higher light transmission and improved color rendition underwater. Divers will appreciate the distortion-free vision, allowing them to perceive the vibrant colors of marine life with remarkable accuracy, even in low-light conditions.   

Comfort is paramount in the M-1's design. The supple, double-feathered edge silicone skirt creates a watertight seal on a wide variety of face shapes, ensuring a comfortable and leak-free dive. This high-grade silicone is also known for its longevity and resistance to degradation from saltwater and UV exposure. The low internal volume of the mask makes equalization effortless, a crucial factor for comfortable and safe diving at varying depths.   

The M-1 features a wide split-style mask strap that further enhances comfort and security. This design distributes pressure evenly around the head, preventing uncomfortable pressure points, even during extended dives. The inclusion of easy-to-adjust buckles allows for quick and precise strap adjustments, even while wearing gloves.   

Beyond recreational diving, the Hollis M-1 is also favored by technical divers and freedivers due to its low volume and exceptional field of view. Its frameless and foldable nature makes it an excellent backup mask that can be easily stowed in a BCD pocket.