The SeaClear RayBlocker-HD mask is not only a popular mask in the RayBlocker-HD line, but it is the only mask that can accept corrective RayBlocker-HD lenses. RayBlocker-HD lens coatings use Sharper Image Technology, which provides enhanced edge definition, making subjects appear as if they are in high-definition. Effectively reduces glare and UV. Fog resistant coating. The SeaClear Mask is available in black, hypoallergenic silicone and is sure to fit most faces.The ratcheting buckle system is easy to adjust with gloves on. Plastic box with lid included.