[Fondueset]

My monofinning is very much work in progress but what I've noticed with the hard fin is less motion more evenly distributed through the body. The soft fin seems to want more motion through a wider range. With the stiffer fin I'm able to glide along right at the edge of movement - very little knee bend - its almost a sort of spring effect - as though just the ambient tension in the tendons is doing part of the work thereby saving energy. Its a little like fa-jing in that there is a transient focus of tension with very little exertion and with no loss of 'flow'.
I can feel imperfection in force transmission with the closed footpockets but the trade-off of comfort and endurance is definitely worth it. What is your endurance with open heel during warmer weather?