This is the Riffe Mantis Mask Spearfishing Freediving Mask - Lens Options Features: Heat treated silicone rubber Durable nylon frame GoPro mount capability 2 Tempered glass lens options: CLEAR - standard AMBER - for increased light, higher contrast and better separation in low visibility All RIFFE masks are made of heat treated silicone rubber to reduce fogging. Durable Nylon frame for superior strength. The plastic and silicone mold are of the highest quality and is evident when handling the mask.