The Horsewear Wash Bag prevents damage to your washing machine.  Suitable for washing numnahs, stable rugs, under rugs, exercise sheets, coolers/fleeces, summer/fly rugs, girths, travel boots, bandages and pads. The wash bag acts as a filtration system for your washing machine. It works by retaining a horse hair inside the bag during the wash cycle whilst allowing a free flow of water through the bag to clean your items. After washing any trapped hair can be shaken out of the bag.