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To reduce friction, you can use a lubricant on your feet, either a powder or a semi-liquid. A powder can act as both a lubricant and a drying agent, but too much can form clumps if it gets soaked. I like Here is a partial list of some of the options* Hydropel, which lubricates and helps prevent the skin absorbing moisture; it's and is particularly useful in wet conditions. It does lubricate slightly, but its water repelling powers are its prime attraction.* SportsShield is similar to Hydropel, both being based on a silicone lubricant (dimethicone). SportsShield is available as a roll on and towelette, whereas Hydropel is dispensed from a toothpaste like tube.* Vaseline is cheap and can be used in large quantities. This can provide good lubrication, but tends to keep the skin quite moist. It also makes it harder to attach tape if this is required later. * Aquaphor is quite similar to Vaseline. Though it has different ingredients, I have not found a significant practical difference as a foot lubricant. * Bodyglide is one of the original products purposefully marketed as a sports lubricant. While effective, it does not seem to last very well, nor does it reduce the friction as much as other products. * Blister Shield powder is Teflon, which I found helps a bit, but tends to form clumps when wet. * Zeasorb powder absorbs six times its weight in water, which sounds effective, but water is heavy and powder is light. To absorb the level of sweat put out by a runner, a lot of powder is required, which I've found to be impractical. See [http://www.zombierunner.com/store/categories/foot_care/powders/Powders] and [http://www.zombierunner.com/store/categories/foot_care/lubricants/Lubricants].