Machine Washable Design Mats Bordered Line Design Grey. These striking and practical mats are hardwearing and multi-purpose, making them easy to clean. Produced from stain-resistant durable polypropylene, they are machine washable with a slip-resistant backing. Non-slip backing, Machine Washable at 30°C, Eco-Friendly, Recyclable & Sustainable. Suitable for all floor types. Ideal for kitchens, hallways, doorways, conservatories & utility rooms. Material: Pile: Polypropylene, Backing: Latex. Your new rug may need time to settle after unfolding. Creases are normal and will flatten over a few days. To speed up the process, fold the rug in the opposite direction, hoover it, and place furniture on it.