Lost my ScubaPro Clear Vu4 mask at the conclusion of my last dive today April 3, 2011 at one of the inshore Hathaway Bridge spans off Panama City Beach, FL. It has a blue frame, a black and blue ScubaPro neoprene strap cover and bonded prescription lenses. The boat took an unexpected roll to port just as I was at the top of the ladder, causing me to lose balance and drop back into the water, stripping my mask off. I had already handed my fins up to the deckhand and my mask sank too fast for me to catch it fully geared with just booties on.