K&H Manufacturing Cool Bed For Dog Large 37X48 Inch electric dog fence requiring BOTH vibration AND sound requiring BOTH vibration AND sound to trigger a correction CLIX No Bark collars also feature different levels of sensitivity Cool Bed Large 37 in X 48 in We re now keeping pets cooler than ever with the new Cool Bed III No electricity is required to operate the Cool Bed III and these beds are attractively designed and allow a cool spot for dogs Simply add the recommended amount of water through the easy fill cap and adjust the comfort with the easy air valve Our unique Cool Core diverts the liquid better than ever throughout the bed for advanced cooling power The new nylon vinyl exterior is tougher than ever