1K Reasons - our top-of-the-line 1K collection is designed for the elite player who has logged thousands of reps on their journey to become the best Play Protected - added side elbow protection designed to protect the elite attackman from heavy stick checks around the crease Form & Function - breathable sleeve and three-piece pad design provides improved mobility for added dexterity. 360+ strap holds firmly in place. Lighten Up - our high-density HD2 polymer foam provides premium protection that won't soak up sweat or rain STX Stallion 1K Lacrosse Arm Guards in Black Size.