About martingale collars: Martingale collars are great for maintaining control of and training your beast. The cinching action is quick to engage and release for simple and effective commands and corrections. A martingale collar can also help to prevent your pup from backing out of the collar during walks. -Made with highly durable & abrasion resistant, sublimation printed polyester webbing. -Easy size adjustment to ensure a custom and secure fit. -Cinching section in collar offers enhanced control and allows for quick and effective commands and corrections. -Box-and-cross stitch construction with tapered seams creates a smooth transition between layers and is extremely strong. -Reinforced nylon side-release buckle with laser-etched logo is curved to match the curvature of your dog's neck. -Powder-coated steel D-rings with welded seam for extreme strength. -All webbing ends are hot-cut so each fiber is prevented from fraying.