It is 45 degrees at that point, less elsewhere. Volume is low and the standard-sized strap adjusts easily in swiveling buckles. At A Glance Pros - Good field of view, good nose access. Con - Field of view somewhat restricted. Volume - 140 cc.
Volume is quite low.
Buckles swivel and are mounted inside the frame in such a way that nothing protrudes to catch line or seaweed. You push a button to free the strap for adjustment. Stylish frames are hand-painted. At A Glance Pro - Buckles cannot snag weeds, lines, etc. Con - Field of view somewhat restricted.