EASY TO BREATH - Full dry top snorkel can eliminate water entry when submerged. Just one quick exhale will open the valve and push the water out. ANTI-FOG TEMPERED GLASS - Crystal clear tempered glass lens of the mask provide anti-fog function which can helps remain high clarity without leaking. EASY TO USE - Soft and fully adjustable head straps, new type of clip for attaching the snorkel to the face mask strap easily, a good choice for biginners and divers. SAFE MATERIAL - Food grade silicone, mouth piece and flex skirt is safe and soft enough to make you comfortable when diving or snokeling. SUIT FOR - Perfectly fits men, women, teenagers and so on, helps you enjoy a nice diving experience under clear vision, here is warmly note please use in safe and effective environment.