Compatible with all liner system rugs where you see the liner icon. Made with polyester outer and lining, with fiberfill. A simple system, Horseware® liners give you superior insulation properties without the need for two rugs. The liner attaches by Velcro loops to the neck area of the outer rug, and clips onto the back corners to prevent the liner from slipping. Liners can be easily washed in a domestic washing machine.