Made from top-grain bridle leather for strength and endurance with a nylon core for added strength. Incredibly strong, but supple, softening over time but remaining sturdy for a reliable collar that is comfortable for dogs to wear. Please note that leather is a natural, porous product. If the leather becomes wet, some colour run of the natural dye may happen. Leather collars ought not be saturated with water. If the collar becomes saturated, allow it to air-dry naturally and do not use heat to speed the drying process.