Gurney Goo 10ml is the pocket sized tube of the anti chafe and anti blister balm that New Zealand adventure racing legend Steve Gurney spent twenty years perfecting. It lays down a waterproof barrier of silicone, beeswax and tea tree oil that keeps skin dry and friction free through long, wet days on the trail. Work it into feet, heels, inner thighs or pack straps the night before a big day, and again the morning after a river crossing when your feet have been soaked for hours. At 10ml it weighs next to nothing and lives in a hip belt pocket, so it's the one you take when every gram counts.