In the past we brought our own mask and snorkel and used Sunsail's snorkel fins. The fins are ok, but they did not always do a good job weeding out the fins with cracked foot boxes, torn straps or missing buckles. More than once I've been annoyed having to dig through a box of mostly defective fins. I usually take an extra pair too, because you never know if that strap you pull on will break due to dry rot. Eventually we switched to using our own, but mainly because we have an owner's box to keep them in.