These collars are made by Leashes by Liz, a Colorado company located in Broomfield. Each strand of parachute cord has a tensile strength of 550 lbs, giving the collar a breaking strength upwards of 4000 lbs! Paracord is bright, mold and mildew resistant, colorful and fade resistant and they come in a wide variety of colors. A big thanks to Leashes by Liz for working with CGA to bring these beautiful collars to our store!