PLASMA is a mask made in anti-allergic silicone and it is designed specifically for free diving and spearfishing. It features a wide field of vision and an extremely reduced internal volume. The field of vision of PLASMA has been optimized thanks to two factors: the geometry of the lenses and the reduced distance of the lenses from the eyes. This has been achieved by manufacturing the mask in a single piece. Mask Skirt made in 50°shA soft silicone with a variable thickness and matt internal finish. Anatomical adjustable silicone strap. Ultra resistant 3mm tempered glass. Polycarbonate buckles WARNING: This product can expose you to chemicals including lead, which is [are] known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.