BlistWool's natural moisture absorption, anti-bacterial & friction reducing properties aid in the prevention of hotspots & blisters. Not requiring any adhesives, it works by attaching itself to the sock fibers so it stays in place without leaving any sticky residue behind. After use, BlistWool simply pulls away from your sock & can be discarded or composted. BlistWool is 100% Canadian wool grown by sheep on British Columbia, Alberta, and Saskatchewan farms. The wool is then washed and processed in Alberta, Canada. The wool is first washed with a mild, plant-based, bio-degradable detergent and then rinsed with clean water. We do not use chemicals in our processing to remove dirt and vegetation because it reduces the effectiveness of wool's natural qualities. It is also not bleached or carbonized unlike much of the wool traded on the world market. Next is carding. This is the process of brushing the wool fibers with wire teeth to align them. Once this step is complete, we box it up.