These whelping puppy ID collars provide a simple and effective way to identify and track multiple puppies or kittens in a litter. The set includes 12 collars in 12 distinct colors, allowing you to easily distinguish each animal. Made from soft polyester fabric, the collars feature a double-sided design that sits comfortably around delicate necks without causing irritation or discomfort. The adjustable fasten strap design allows you to customize the fit as your puppies or kittens grow, accommodating neck sizes conveniently without the bulk of traditional buckles. This lightweight construction minimizes any burden on young animals while ensuring a secure fit. The collars are washable and reusable, maintaining their color and quality through multiple cleanings. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.