LOVE PEACE DOGS brand collar. The strap used to sew the collar is made from high-strength American nylon. It's soft and comfortable, yet incredibly strong, with a tensile strength of up to 2 tons. Our signature dog collar buckle is made in Korea by one of the world's coolest plastic quick-release connector manufacturers! Also, measure the area on your dog's neck where you want the collar to fit to ensure a secure fit. If your dog's neck is between sizes, choose the larger size.