About this product range:~ Comfort Collars Let Your Pet Rat, Ferret Or Guinea Pig Walk In Style! This Fashionable Pet Accessory Is Made From A Unique Material That Is Stretchy For Safety & Cottony For Comfort. The Attached Furry Friend Finder Bell Helps You Locate Curious Critters. The Stretchy Stroller Leash, Sold Separately Can Be Attached For A Safe, Indoor Walk.