I have had other swimming masks in the past from...

I have had other swimming masks in the past from Cressi and Technisub because I prefer them to the small regular goggles that you seem to have spend ages adjusting and which seem to constantly leak. These Hydra goggles are like a half way house being somewhere between regular goggles and a swimming mask. The quality is superb. They're easy to fit and adjust and, most importantly, do not leak, while remaining comfortable when swimming for over an hour at a time.