The STX K18 Shoulder Pads are built with d3o technology which provides excellent impact absorption, ideal body fit and maximum freedom of movement. The low-profile design keeps the arm guard lightweight and flexible. Stretch zones in the chest and back plates allow upper body to move freely. The coverage of a shoulder pad in the comfort of a liner. Elevated polyester liner for moisture-wicking and breathability. Includes adjustable/removable upper arm pads. Constructed with contrasting matte and patent leather for a unique look.