Simple, effective and comfy! Add a heel pad to your swimfin strap for a few reasons....

* Better more snug fit, so your strap won't slip off your heel (consider adding tethers so you don't lose your fins)
* Prevent the swimfin from rubbing on the Achilles area
* Adding comfortable soft neoprene on the heel area instead of feeling rubber
* Great for kids or people with narrow feet that don't quite fit their swimfin

Velcro it around the heel of your swimfin and BOOM!