This is the easiest dog vest you (and your dog) will ever use. Simply lay it on the ground, align your dog's front feet with the openings, pull it up, and zip up the back. It's so fast, your dog won't even realize it's on until it's all zipped up. Small opening to allow lead access; collar secures with a hook-and-loop fastener. Measurement reflects neck-to-tail length. To determine the correct size, measure from the base of the neck to the base of the tail. Polyester. Washable. Imported.