service: Profiled splash guard significantly reduces water entry. Flexible lowerbore reduces jaw fatigue. High-quality silicone mouthpiece is comfortable and durable. Angled mouthpiece reduces jaw fatigue. This revolutionary mask is made of High Seal Silicone, a material that offers unprecedented comfort and a perfect seal ideal for scuba diving, snorkeling, and freediving. The raked lenses, with their inverted drop shape, are quite small and are inclined as close to the eyes as possible to improve the downward visibility. The lenses may be replaced with prescription optical lenses ideal for myopic. Both semi-dry snorkels and tempered glass diving masks focus on comfort and safety. The snorkel is equipped with a soft and comfortable mouth pad and an adjustable fixing strap to ensure a good fit with the mouth and make breathing smoother. The tempered glass mask has a user-friendly design, and the adjustable mask straps allow the mask to adapt to different face shapes, better fit the face, and provide a stable and comfortable diving experience.