The Premium Chenille Microfiber Wash Mitt is made of thick microfiber strands that are extremely absorbent to car shampoo and non-abrasive to paint and finishes. This delivers a premium wash while reducing friction and enhancing paint. This mitt is washing machine friendly. Never expose them to fabric softener. Fabric softener will reduce their static properties and cause the microfiber to clean/spread less effectively. They can be line dried or machine dried on low setting, again, separately from other laundry.