I love me espidrille's but hate tying the straps around my ankle so after a real good look I dove in and removed the straps replacing them with elastic.
This picture show one completed and one still to do. As you can see the later goes around the ankle and ties in the back which is really annoying.
This is the elastic pulled through were the strap was.
Reusing one of the straps I made a cover for the elastic. This slipped on one side and then I overlapped the ends of the elastic and sewed them together, then adjusted the fabric to cover.
They fit great now I can were them more often.