The Waterproof Seat Covers are a great choice for protecting your car seats from dirt, dander, and “spills”. Features the SmartFit system which provides a significantly improved fit on all vehicles; includes elasticized panels on sides and front, Sta-Put seat anchors, seat belt “keepers”, and cinch straps on corners (complete list of features varies by style). Made from durable, 600d polyester material with a fully waterproof backing. Machine washable. Seat belt slits are covered to better protect vehicle seat.