This is a mask by Gull. Vader 420BK Satin Rubber BK GM1293C This is a high-quality mask for scuba diving. The lenses are equipped with UV420, which cuts out ultraviolet rays from light and sunlight in the ocean. It's gentle on the eyes, allowing you to enjoy the sea. It fits beautifully on Japanese faces and is a very good mask. For those starting scuba diving, or experienced veterans. How about it?