New DonJoy Performance WEBTECH Knee Support Brace w Compression Undersleeve Lrg Gray White Logo This connector piece should create MoonRock This connector piece should create one of the stiffest feels that you'll find on a two piece bat while also mitigating the vibration that gets down to a player's hands on a miss hit the two lines running up the back of each finger Silicone web technology helps absorb shock and shift loads from the painful area of the knee Dual Axis hinges work with the web for improved fit and articulation Compression molded back pad with mesh for maximum comfort and breathability Undersleeve with stash pocket and anti migration technology Reflectivity for enhanced visibility in low light conditions