Full-face snorkeling or diving mask, has shape fitting face, mouth, chin and ear regions of wearer's head, and is made of silicone or other compliant rubber-like material

摘要

Full-face snorkeling or diving mask has a shape fitting the face, mouth, chin and ear regions of its wearer's head. It is made of silicone or some other compliant rubber-like material, and is held in place by a system of straps.