The soft exterior is made of high quality plastic. Sherpa wool provides additional comfort. Soft wool material: with a layer of tin foil paper, self-heating; Free from harmful substances and environmentally friendly. The pillow's cozy fleece cover can be easily removed with a zipper and washed in the washing machine. Thanks to the optimized non-slip rubber nubs, the blanket slides off easily and prevents slipping in the event of an accident. Versatile: Whether at home on the floor, on the sofa, in the car or outside in the cat/dog kennel - the exclusive electric blanket from keeps your pet warm everywhere. Also ideal for smaller pets (guinea pigs, rabbits, etc.) and particularly suitable for pets with arthritis (joint pain). Increased slip resistance thanks to the optimized non-slip rubber buttons: Thanks to the optimized non-slip rubber buttons, the blanket is prevented from slipping easily and slipping on the floor is prevented. Ideal for use in the car or for smaller pets such as puppies, rabbits and guinea pigs. The easily foldable material can be used anywhere with the self-heating blanket