Buddy Belts Dog Harness Liner LONG STANDING REPUTATION. Buddy Belts has been making luxury dog harnesses and various pet products since 1997. CUSTOM DESIGN. Each Buddy Belt Liner is custom designed to fit the corresponding Buddy Belt harness size. EXTRA COMFORT. Who doesn't like some extra comfort? Our liners offer extra comfort for your dog whether its for sensitive dogs or simply to be used as extra comfort until the - Buddy belt harness softens, and molds to your dog. PREMIUM MATERIALS & MANUFACTURING. All Buddy Belt products are made with an eye for detail and premium materials so that they will be sure to last.