I just ordered a pair of reg. & XL size yellow fins (1 for wet suit boots, 1 for rock boots)the other day. The reg. size was in stock & the XL still back ordered. I'm not in a hurry for the XL, as I still have my Jet Fins & they work fine for the time being. I chose the yellow fins because most of the tech divers at our shop dive the F1's (the solid black ones) & I want a way to tell them apart from everyone else, plus the underwater visibility is also nice.