This mask design offers a 150% increase field of view (at 1 meter); with its use of a larger single piece lens.  The construction shortens the distance between the lens and your eye, to improve range of view and reduce its volume.

Constructed from a strong Polycarbonate frame, bonded directly to the soft silicone skirt, and a tempered glass lens.  The flexible buckles allow for a comfortable fit, and the wide design suits a standard to wide face.