I joined FLX Rewards at 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? What are Xtra Boosts? How do I join FLX Rewards? The item I want is marked “excluded from discount.” Can I use FLX Cash to pay for it? What are the full FLX Program membership terms and conditions?