- Heated sleeves for arms - Reduce the risk of injury for pitchers - Soothe and soften tissues - Increase nutrient-rich blood flow - Repair damaged fibers - Relax muscles and ligaments - Increase flexibility - Maximize blood flow - Keep the arm warm and flexible - Reduce muscle fatigue - Lessen the chance of injury - Each sleeve comes with its own rechargeable 8,000 mah power bank battery - Arm warmers during fall and winter months - Made of unique textured fabric - Stay in place during rides - Can be used with any jersey - Designed to keep the arms warm - Made of premium brushed fabric