- Made of sustainable natural hemp: for your dog and the planet! This sturdy collar is made from hemp canvas and soft organic cotton. It’s hypoallergenic, odor resistant, and kind to the planet. Hemp dog collars are machine washable and dryer safe. In fact, they get softer with wear. 2. This collar helps dogs in need of homes: we donate 10% of all proceeds to Dog Rescue. 3. It is light to carry, relatively light and good to carry out 4. A warm reminder when buying a collar, you can measure your pet’s neck width with 2 fingers remaining, which will make it easier for you.