It safely creates a durable. breathable barrier that dries clear and effectively protects against liquid and dirt. Repel is safe to use on most absorbent materials including leather. suede. nubuck. canvas. cotton. nylon. knit. woven. mesh and more (Not recommended for unsealed leather or vegetable tanned leather). The non-aerosol delivery system outputs a continuous fine mist covering large areas quickly and evenly in all directions.