RASTA DOG Adjustable Collar Eco-Friendly Bamboo with fleece lining available in multiple sizes and colors Bamboo is Natural Anti Bacterial & Odor Resistant Material. One of the strongest and most durable natural fibers on Earth. Super stylish with the cozy black fleece lining for your pup's comfort. Ideal collar for everyday use. These fabulous earth friendly dog collars available in four sizes and four colors. Please check other RASTA DOG products for matching leashes.