Football players wear tape on their arms primarily to protect their skin from turf burns, scrapes, blisters, and calluses that can occur when they slide or fall on artificial turf surfaces. This tape acts as a protective barrier between the skin and the abrasive playing surface, helping prevent painful injuries that could sideline a player. The tape also allows for better ventilation and freedom of movement compared to wearing long sleeves, which can trap heat and cause overheating during intense gameplay. Additionally, some players use tape for added support on muscles and joints, or for kinesiology purposes to reduce swelling and improve performance. While it may also serve aesthetic or psychological purposes for some players, the main functional reason is injury prevention and protection during the rough, physical nature of football play.