Leather care grease for smooth leather, smooth and nubuck fatty leather. Since its creation in 1920, Everest leather grease has gained a special reputation for protecting mountaineering boots and all leather items exposed to extreme climatic conditions such as water, snow, and dirt. Apply the grease sparingly with a brush, then massage it in with a cloth, let it dry, and finally give the leather a shine with a boar bristle polishing brush. Everest leather grease is particularly nourishing and may darken some types of leather; therefore, always test it in an inconspicuous area first.