Used Scubapro Frameless MaskSCUBAPRO's FRAMELESS is diving's original frameless mask, and it's still the best. Its distinctive rectangular single lens shape provides an excellent field of view on the periphery as well as straight ahead. The soft silicone skirt is comfortable yet durable, and the double edge seal feels good against the skin. The buckle system is easy to use and allows for quick adjustments. Buckles attach to flexible tabs on the skirt; this optimizes strap angle