I have had two pairs of these, comfy, last well.  I just wanted to say that I would prefer they lose the silly bottle opener.  I don't like to drink where I walk (or ..... where I eat, for that matter). These will also scratch boat decks and wood floors when they get worn down a little.  On boat decks it's worse because there are curved surfaces where even new shoes will gouge the gelcoat or paint. Great way to get thrown overboard or not invited on subsequent fishing trips.  They should include a nice aluminum bottle opener key chain instead, would cost them 0.10 if that.