With its silicone impregnated sponge, Hunter Instant Boot Shine gives leather and rubber boots an immediate buffed finish. Contained within its own durable casing, it is ideal for use when travelling, in the office or at home. Composition: Silicone Sponge Note: Silicone may cause certain soft leathers or light coloured materials to darken slightly. Test on a small area before general use of the product. Do not use on suede or nubuck.