This set of 2 pieces yellow and blue reaction balls are uniquely designed to help improve your skill, coordination and ability. The soccer agility ball allows you to pick up your current pace, while improving reflexes and providing you with instant feedback of what's great and what you need to work on. The two-piece pack of reaction balls are easy to see and use helping you improve your skills while having fun. By investing in sporting equipment, you are investing in your athletic and training goals.