Here is a video I posted on our other website that is meant to explain how to use the Indo Original Flo GF for balance training, posture, and core stability.  I wasn't going to post it here, but it is VERY applicable to Stand Up Paddle Surf training.  I have been using this Indo Original Flo GF with my clients and I'm finding that it is so valuable to use on One Foot!  Training one foot at a time is a great way to break your balance down to into finer segments and target one leg at a time.  If one leg is stronger (which usually is the case) then you can target that leg more to build up your weak links.  Enjoy!