PETMAKER Self Warming Thermal Pet Crate Pad Self Warming Pet Cushion/Crate Pad, Soft Sherpa Exterior Thermal Insulation Layer Radiates Heat Back to Your Pet Safe and Soft materials, Perfect for Lining Crates, Layout on the Couch, Floor or Pet Bed Care Instructions: Wash Separately with warm water, do not tumble dry, do not wash reflective insert Eliminates Need for Electric Pet Products! Dimensions: 18 Inch (L) x 25 Inch (W)