With wash+dry Design, you secure washable and dryer-safe mats. This makes them perfect for allergy sufferers and pet owners. The wash+dry Design models are produced in Europe and have a backing made of 100% nitrile rubber. They are easy to care for, particularly flat and dense in pile, sound-absorbing, and non-slip. The mats are washable up to 60 degrees and even dryer-safe up to 90 degrees.