X-Sports Tribord EASYBREATH MASK Snorkeling Mask Snorkeling Package (Turquoise, S/M) FIELD OF VISION: 180 field of vision and shatterproof polycarbonate window for added safety. EASY BREATHING: Full mask for natural breathing through the nose and/or mouth. Exclusive breath ventilation concept prevents fogging. Snorkel top can be seen from 4 times further away than a traditional Snorkel. Size: please find the size chart from the 2nd picture on the left.