The heel strap on this croc is an adjustable strap with Velcro fasteners on each side. This seems a nice upgrade, but when they put the same length strap on my size 15 crocs, as a size 10... the straps are too short to make the Velcro attach. Only about 1/8" of Velcro surface area on each side. So the Velcro quickly comes loose with such a tiny area for binding together. Another half inch in length would fix this issue. I'll have to find a shoe repair shop to hack my heel strap and give it more length.