Reebok 7K Lacrosse Arm Pads are the on-field protection you need for high-impact play. The forearm of the 7K Arm Pads is backed up by Gryptonite™ to keep protection where it belongs. PlayDry® moisture control material and ergonomic elbow cap design ups the comfort factor so you can focus on playing your best Sz. S= 5' - 5'5" height, M= 5'6" - 5'11" height, L= 6' - 6'2" height, XL= 6'3"-6'6" height.