PetEdge Miracool Dog Mat, Medium, 24-Inch, Cowboy Blue This unique mat helps keep dogs cool on hot summer days Water-activated crystals keep mat cool for days with one 30 minute soaking in cold water When hydrated, the pad provides a cool, cushiony soft resting spot on floor, patio, or other shady place Comes in medium size Measures 24-inch length by 20-inch width