Double the Security, Double the Strength The EzyDog Double Up Collar is the choice for anyone wanting a dog collar with added strength and flexibility. Simply attach your leash to both Stainless Steel D-Rings for extra security and peace of mind. The Stainless Steel D-Rings and the highest quality materials have been used to ensure that this collar is comfortable and easy to clean. The Double Up is made from our proprietary soft touch webbing, that is both soft and tested to be incredibly strong.