Nike Vapor Arm Guard - Men's Nike Vapor certainly has an athlete following, and now you can get its elite performance in your protection, too. Ultra-lightweight and breathable, these arm guards are created with a better-fitting, contoured design. They're equipped with plastic elbow caps that bring rigid protection but still allow some flex for movement. Within the caps are metal mesh zones to add cooling ventilation. Three separate pad sections allow easy bending of the arm and are held in place by internal silicone nubs. Sizing: M (for players 91-140 pounds), L (for players over 140 pounds).