While great fitting boots are the key to avoiding blisters, sometimes you just have a bad day. eZeefit booties act like a second skin and create a friction barrier so that any rubbing that does occur happens on the outside of the bootie, and not against your feet. These work great wet or dry, don't have sticky glue to create messes in your socks, and are washable and reuseable. 2mm booties are our most popular option. They work great in hiking boots, cross country and back country ski boots, and mountaineering boots. They take up a little more space so that the amount of movement in your boot is reduced, as well as creating a friction barrier.