The BURGOL leather sol oil is based on pure natural oils and fats, which are adjusted to the pH value of vegetable-tanned (vegetable) leather soles. The leather sole oil improves the waterproofing of the leather, which has a positive effect on the flexibility and durability of the sole. A sole treated with BURGOL leather sole oil lasts twice as long as an unkempt outsole. Special Care Oil for veg. tanned leather soles. Doubles the service life of shoe sole.