Expanded panoramic view through 1-window lens; Patented domed side windows; Reduced frame structure to reduce blind spots; Equipped with Freedom Technology; Three-dimensional strap for unprecedented fit; Five-position strap angle adjustor for micro-adjustment; Panoramic View masks feature a variety of designs offering an incredibly wide field-of-view; The Quick-Adjust Buckle System incorporates a newly-designed low-profile buckle; TUSA's Round Edge Skirt features a proprietary round edge cross-sectionally shaped skirt