Achy Paws - Copper Comfort Pet Mat Bamboo Technology Self-Warming Pet Mat - For Natural Pain Relief - Medium - 30"x20" Soothes Tired Muscles, Reduces Soreness, Lowers Stress & Anxiety, and Melts Away Discomfort Simple & Easy to Use - Activated by Body Temperature - Portable & Machine Washable - Absorbs Odor, Harmful Toxins & Pollutants No Electricty Plug-in - Completely Safe for Crates & Beds - Calms Restlessness for Better Sleep Comfortable Triple Layer Fleece - Your Pets Will Love You For It!