Hampshire Carpet and Upholstery Care Stain Protection creates a protective shield that repels liquid and dirt giving you time to clean any spills and avoid stains. For example, if you spill wine and the carpet/upholstery lacks protection, the carpet/upholstery will turn a pink colour as the wine soaks up into the fibre. Should you spill a glass of red wine and your carpet/upholstery is protected, you will see the wine bead up and stay on top of the carpet/upholstery, giving you opportunity to clean it and stopping it from staining the carpet/upholstery permanently.