Hand Crafted in the USA -Made of waterproof, colorfast durable hollow core multi-filament polypropylene roping. Features all brass hardware and bowline knot. These check cords are UV coated to protect against decay and fading and have a hard finish applied to move through tall grass easily and prevent hang-ups. The super cord is also perfect for water training because it floats. These are the professional's choice for teaching the recall command and for retrieving to hand.