M-PETS Warmo Self-Heating Mat is a great way to keep your pet cozy and warm without the use of electricity. This thin but powerful mat contains a special interior layer that reflects your pet's own body heat back at them. The soft plush cover is machine washable and includes a non-slip bottom to help keep the bed in place. Provides warmth by reflecting pet's body heat No electricity required Anti-slip bottom Machine washable cover Contains 4 layers; PV plush cover, heat-reflecting inner layer, fibre filling, and anti-slip bottom Available Sizes: Large: 60cm x 75cm (23.6" x 29.5") X-Large: 70cm x 110 cm (27.5" x 43.3")