I joined FLX Rewards at Kids Foot Locker. May I still use my benefits at Champs Sports? Absolutely. Your membership status and benefits follow no matter where you shop across the Foot Locker family of brands. Related articles How do I manage my FLX Rewards account? How do I redeem for rewards? How do I join FLX Rewards? Who do I contact if I need help? What are Head Starts?