The SpikeVest for Cats is similar to the original CoyoteVest but it uses Velcro instead of snap buckles and is designed specifically for cats. Just like the CoyoteVest the purpose of the SpikeVest is to slow down or prevent a surprise attack and give the owner enough time to intervene before serious injury occurs. The SpikeVest for Cats covers the back and the neck with a formidable array of shiny spikes that makes it very difficult for a coyote or aggressive dog to bite down. It's entirely constructed with a super tough puncture resistant Cordura® fabric that can resist sharp teeth and features a large collar to protect the back of the neck. The SpikeVest for Cats includes a full set of removable chrome spikes. Spikes for the neck and set (2) Spike strips for the sides of the back. The spikes are made from very hard plastic because metal spikes are too heavy and they can rust. The spikes are not dangerous to handle but with enough pressure they are sharp enough to hurt. Velcro makes it easy to remove the spikes whenever necessary to avoid any chance of accidental injury to other animals or people. The SpikeVest for Cats also works perfectly with our CoyoteWhiskers accessory which is recommended if you are concerned with predators. The SpikeVest wraps around your cat easily and stays snug and secure with two wide Velcro belts. Your cat should not be left unattended while wearing the SpikeVest. There is a D-ring at the top of the vest for use with a leash and the reflective features make your cat more visible at night. The vest is water-proof, there are no metal parts that can rust, and it's hand-washable with a mild detergent and air dry in shade. Do not put in dryer. *Color topper may fade overtime in sun. Please note that the fluorescent orange fabric will fade quicker due to the yellow and orange hues. This color change does not impact the quality or effectiveness of the vest (Similar to hunters vest, hats and safety vest.) Choosing a Size When choosing the correct size vest the most important thing is the length of your cat's back. The collar and the waist are very adjustable but if you order a vest that is longer or shorter than the length of your cat's back it will not fit properly and you will need to exchange it. If your purchasing as a gift we do offer gift cards that can help keep your secret. All you have to do is measure the length of the back from the shoulder to the start of the tail -- make sure the cat is standing up and not sitting. If your cat is a little rounder than normal we would recommend ordering the Extenders for the waist & possibly the Neck. After measuring and you are still uncertain on which size to get, it is usually better to go with the smaller size. We receive more returns/exchanges with the vest being too large rather than too small. EXAMPLES: Back length 10" - 12" recommend Extra Small. Back length 12" - 15" recommend Small. Back length 15" - 18" recommend Medium. SpikeVest Size Guide Size Vest Back Length Waist Neck X-Small 10" 10" - 12" 7" - 9" Small 12" 12" - 15" 8" - 10" Medium 15" 15" - 18" 9" - 12" While we strive to display as accurately as possible the colors of the products shown on our website and services, it cannot guarantee that the colors shown on the services exactly reproduce the colors of its products. This may depend on the color reproduction on your computer or mobile device.