Each Aero-Swing Full Size weighs only 3.9 oz. but generates 10-12 mph of airflow resistance! Experience the newest innovation in golf swing speed training. This patented technology uses airflow restriction in the right moments of your golf swing to increase swing resistance that will ultimately help you increase your swing speed. Here’s what you’ll get: 2 – Aero-Swing Training Aid, 2 – Sets of Stabilizers, 1 – Carry Bag.