The EzyDog Double Up Collar offers superior strength and comfort, and can also be used effectively as a dog training collar in conjunction with a harness and/or a leash. EzyDog has effectively found a way to double up on strength while still offering an attractive and durable collar with this double d ring collar. Whether you need some small dog collars or large dog collars, the double D ring collar is still an excellent choice for you and your dog! Take your dog with you on vacation with this high quality collar which reduces the risk of him losing his collar or breaking it off. Dogs are incredibly tough on their collars, and it takes good engineering to make a sturdy double up collar. Not only was durability in mind when EzyDog created this, but also your dog's comfort was in mind. Dog collars may be worn for hours at a time by your pooch, so it's important to have a collar comfortable enough that your dog won't even notice he's wearing it.