The oddly shaped windows on this new Mares mask make sense when you look through them. The frames zig outward at eye level to maximize your sideways view, and zag downward directly below your eyes for more downward vision. The result is a top score in the horizontal plane and an excellent rating in the vertical. Though not technically frameless, it still folds flat because the buckles are mounted to the skirt, not the frame, and can fold with it.
The success of this scuba mask derives from meticulous computer design and numerous optical tests. The central position of the eyes and the optimally angled windows provides the widest possible viewing angle in every direction. Quick-adjusting ergonomic buckles are positioned directly on the skirt.