20% of proceeds are donated to the U.S. Friends of the David Sheldrick Wildlife Trust, a registered 501(c)(3) public charity in the U.S., whose charitable purpose includes supporting programs and initiatives of the David Sheldrick Wildlife Trust in Kenya. Up Country Martingale collars are a gentle way to have control over your dog. Perfect for dogs that pull or easily slip out of their collars, Martingales create an even tension around the neck avoiding neck and throat injuries. Please note: Martingale collars should never be left on dogs without supervision. Machine wash gentle, air dry.