For active dog use. Keep your dog cool, safe and comfortable. How it works: Melting ice acts as artificial perspiration keeping your pet cool. What it does: Helps to prevent heat stroke and heat related health problems. Keeps pet happier and more attentive. When and where to use: Use year round indoors with included reusable freezer tube, and outdoors with ice cubes in warm temps or during high activity. Washable, easy to use and re-use, vet recommended, non-toxic, non-staining. To prevent fading, soak in cold water / vinegar before use. Adjustable 17 1/2" to 24". Includes one Kool Tube.