The Bungee Strap from Mares is a great alternative for a steel spring strap by totally outdoing them! The Mares Bungee Strap has great elastic properties for a stretchy and comfortable fit, is lightweight so ideal for travelling and is unaffected by the sun, sea salt or chemical agents for pool diving.
Getting your fin on and off with this fin strap is so easy one handed and with it's large D-Loop on the back it's still easy when wearing thick gloves and the heel cover gives an incredibly comfortable fit.
Constantly adjusting to any compression due to depth reduces the risk of your fin strap slipping off during a dive.