Finsavers
Finsavers are cheap, simple and they
work. Even if your fin fit's perfectly, it can still be sucked off and
gone in a trillionth of a second. Velcro can deteriorate quickly if you
don't look after it so make sure you wash out the sand ... Fin savers that
have a neoprene [wetsuit material] strap are most comfortable and are very
durable. Befor you buy, see how thick the string is. If it is too thin,
then it might cut through the fin's ankle strap or snap.