You can do up-grade your fin to commercial grade spring strap.

To completely install, you need some special skill for modification of the fins.
Please ask our customer support or the distributors of your region.

Quickly put on and take off

Automatically adjusts to changing conditions; no stopping to tighten down a loose strap.
Sturdy rubber grip with finger loop is easy to access, even with thick gloves.
Putting on and taking off is easily possible with one hand.

High durability

Durable stainless steel coil spring will not rust or break.
There was a problem of the strength lack of the mount portion with a conventional spring strap. This problem is solved by a method to fix with modifying the main body of the fin.

Fitting well anytime

The spring strap adjusts automatically to your foot and the difference of thickness of shoes depending on depth. You will never need to adjust the strap of fin during diving.
If you want to change the length of the spring, it is easy to do yourself. Spring with various lengths is available.