How I do I manage my FLX Rewards account? Sign in to the FLX Rewards Dashboard. You can also manage your FLX Rewards account in the Foot Locker app. Related articles I joined FLX Rewards at Foot Locker. May I still use my benefits at Champs Sports? What is FLX Rewards? I signed up for a Foot Locker account. Do I need to also sign up for FLX Rewards? What are Head Starts? How do I join FLX Rewards?