Hunter Instant Boot Shine at Robert Frost Fine Footwear and www.frostshoes.com. The Hunter Shine Sponge is great for travel or at the office for a quick buff. Silicone impregnated sponge gives leather and rubber an immediate buffed finish. Contained within its own durable casing it is ideal for use when travelling, in the office or at home. 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. Hunter Instant Boot Shine is now available at Robert Frost Fine Footwear and www.frostshoes.com.