ScubaPro Steel Pro MaskSteel Pro Mask The single lens, low volume STEEL PRO offers an expansive view of the underwater world. Perfect for freediving or scuba diving, the frameless design is streamlined and lightweight, and the soft silicone skirt provides a comfortable fit on a range of face shapes. Rotating buckles work with a micro adjustable strap to maximize water tightness. The black and white skirts are both very effective at blocking out light reflection at depth,