ATP spirals are superior to the competition because we start with our 98 Durometer, Shore A tubing. This gives our spirals improved "memory," allowing the hose to retract faster and better than softer durometer hoses. Sagging and tangling is minimal, and kinking is virtually eliminated. A harder durometer also provides a smoother bore for better airflow, better abrasion resistance, and a longer service life. Polyurethane spirals feature a compact, space-saving design versus nylon coils, and with a smooth, 90° transformation from coil to tail, it makes it more ergonomic for the user.