MountainFLOW Waterproof Bike Grease is exactly as advertised, keeping water out of places it shouldn't be—like our bearings and headsets. Ideal for protecting these critical areas, we keep this grease close-at-hand in our home bike shops. Though we don’t put too many globs on, a thin layer of grease a couple of times a year on bearings always does the trick and keeps them running smoothly for thousands of miles. Not to mention this grease is plant-based and completely biodegradable, helping us to minimize our impact on the trail systems we ride.