Material and durability Made of grade PVC material that is wearresistant, durable and practical for football referee use. Card access and design Red and yellow cards are placed on the outside of the clip for easy and quick extraction, helping you signal fouls and warnings efficiently. Referee wallet compatibility Football referee cards can be stored in a referee wallet; lightweight for running and helps conserve your energy during long matches. Versatility and compatibility Suitable for school sports training and various sports including basketball, soccer, football and other activities. Use scenarios Youth soccer match: quick card signaling without delaying the game, keeping play flowing smoothly. Gym class basketball practice: fast warnings and fouls signaling during fastpaced drills. School tournament or multisport event: organized kit with readily accessible cards for multiple sports.