So technically this thing lasted less than 30 days. These slippers are well made. I called Chaco to see if there were options, but once again, unfortunately they do not do work on the volv line:( Theyll work on everything else, but not these, and cannot even adjust the straps on these for no reason that made sense to me. If you have any doubts just buy it as their customer support/service is amazing as well on the very few times I have had to use it :-) But not Isotoner! I?m actually pretty surprised they?ve lasted so long in the care of my children, so that?s impressive. I chose the blue in an XL. If your like me and need more pressure and like to get results fast. High quality wall-mount, very sturdy. These are on the narrower side and with thick socks are perfect for me.