Power and space. The Pro Wrap Liner is a Power Wrap on a wee diet, so you don't have to be. Its medium-volume thickness and reinforced cuff provide that same reliable stiffness, but with a 2mm Strobel sole and 7mm removable foam insole you can easily adjust volume. Perfect for custom footbeds, high arches and wide forefeet. Particularly right after Thanksgiving, when your feet are at their fattest, you fatty.