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 and the skirt is very effective at blocking out light reflection at depth. The low volume design makes the STEEL PRO a great mask for all types of diving.