The Martingale Collar is ideal for escape artist dogs or those prone to pulling. Its adjustable design gently tightens when the dog pulls on the leash, preventing it from being removed without causing discomfort. Safety, control, and style in one accessory. Materials The Buttercup fabric is made of 100% cotton, offering a natural, soft texture that is pleasant to the touch, perfect for those who value comfort and classic style. With stainless steel hardware and buckles and reinforced stitching to withstand tension without deforming.