No, No, No, No....
Mole skin. At the Dr. Scholls display in your pharmacy. It's like a cotton flannel patch, with an adhesive back side. You peel off the paper backing from the adhesive side, and stick it directly on your foot where the blisters would form. The flannel side (out) slips against whatever your skin was rubbing on before to cause the blister. But because the patch is stuck on your skin by the adhesive, there's no chafing against it. You can buy it on rolls, and cut the patches any size you want with scissors. This is how hikers and trekers and joggers go miles and miles without blisters.:)