Panoramic Scuba Masks by HydroOptix
If you've ever worn a flat diving mask, then you know that it limits your vision pretty severely. It's hard to see anything that isn't directly ahead of you, as it pretty much kills your peripheral vision dead. However, with these incredibly well-designed masks, you can improve your field of vision by 75%. Not too shabby! Never get pantsed again while scuba diving, because you'll have a better eye on things.