Sizing: Puppy Bumpers are based your Dogs Neck Size NOT the size of their collar / Made in the USA - Fabric is Machine Washable - Tumble Dry Low Diamond Pattern! Heavy duty canvas, sturdy post snap, nylon belting loops. Machine wash and Low Heat dry! FREEDOM FOR YOUR PET: Rather than make costly modifications to your fencing or keep your pet on leash when in the yard or patio, Puppy Bumpers Stuffed Dog Collar allows your pup to run, jump, play and explore! Your pet is sure to love the freedom. STAYS SECURE AND COMFORTABLE: Our Puppy Bumpers are MADE IN USA and Machine Washable. Made of 100% cotton material with Polyester Fiberfill stuffing, Original Puppy Bumpers have ribbon loops on the inside of the neck hole that allow the Puppy Bumper to be attached to the collar (Collar Not Included) to keep it from being pushed over the dog's head. KEEP YOUR PUPS SAFE: Puppy Bumpers are Stuffed Safety Collars to prevent your little pups from escaping through the gaps in your fence. Puppy Bumpers are the perfect choice for most dogs, making even the tiniest pups TOO FAT to fit through the fence! Puppy Bumpers are patented. Puppy Bumpers Keep your dog on the safe side of the fence, just like the Original Puppy Bumpers except these fabrics are only available for a short time. Ultra Puppy Bumpersare for those dogs and pups who have dog friends that like to engage in rough play. Ultra Puppy Bumpers are made tough for the extra active dog and dogs in multi-dog families. Ultra Puppy Bumpers are designed to keep dogs safe despite their being particularly determined to squeeze through the fence rails. Made of extra sturdy materials including Nylon Belting for the neck loops and heavy duty snaps, each Ultra Puppy Bumpers is double stitched for extra durability -strong enough to keep the hard-headed Houdini at home. Ultra Puppy Bumpers are machine washable and tumble dry on low heat and are made in the USA - Sizes are based upon the size of your Dogs Neck. Sizes are based upon the size of your Dogs Neck.