A moleskin bandage is a specialty type of medical bandage that has been designed for use with blisters. They are named for the fabric that lines the exterior of the bandage, which is a durable type of heavy cotton. Since the exterior fabric is so thick, it helps prevent friction damage, making them ideal to use to protect sensitive blisters.
Moleskin bandages are preferable for use with blisters over the traditional adhesive bandage because they stay in place with ease, and offer an extra layer of protection over the vulnerable blister. They can even be used to prevent the development of blisters if you’re breaking in new shoes.