The STX K18 Lacrosse Arm Pads are engineered to be the lightest and most breathable arm pads that STX ever produced. Over Engineered to have the same characteristics as pads twice the price the K18 line is affordable and high quality. Featuring High Impact molded PE Elbow Cap with anatomically contoured for maximum coverage with maximum airflow and breathability. Breathable mesh vents with sweat wicking liner keeps the pads dry and fresh during play.