These dog collars are made out of retired climbing rope! Climbing ropes are only safe to climb on for about a year, so after that time they typically get thrown out. We decided to change that by upcycling them into new products, such as belts, bracelets, dog accessories, and chalk bags. When you buy one of our dog collars, you are not only buying a cool looking collar, but you are also keeping these old ropes from going to waste. PLEASE NOTE: in order for the picture to show you which color you have selected, you must choose both a color and size.