This is the Atomic Mask Box for Subframe Scuba Diving Masks Features: Protect your Investment Durable Plastic Construction Great for Mask Storage Safe from Bumps and Bangs of Transporting Mask Secure Lid Hard Plastic Travel Case Atomic Aquatics exclusive low-profile hard plastic travel case protects your mask. Mask box is made from durable hard plastic has secure lid and fits Atomic Aquatic dive masks.