Crystal Foam is a unique foaming shampoo for use on carpets and upholstery using the rotary scrub, dry foam or bonnet cleaning method. Crystal Foam develops a rich lather, which lifts and encapsulates soils and prevents redeposition. Residual foam dries to a brittle crystal, which vacuums out easily. Soft on velours. Pleasantly scented. Easy to use by hand, Crystal Foam is a must for detailing shops without an extractor.