ARTSWOW Personalized Doormat Justice League Doormats Indoor Outdoor Floor Mat Door Mat Size 18"(L) X 30"(W) Meterial:Durable heat-resistant non-woven fabric top. Design:Backed with a neoprene rubber non-slip backing Wash: Machine-washable Occasion: Indoor & Outdoor These amazing machine washable doormats are good ideal for all doorsteps. All products created by our senior designer at ARTSWOW studio.