SixSixOne - Recon Bike Knee Pad Minimal, breathable chassis with XRD Technology in the knee area XRD Technology conforms to your bodys every move, yet upon impact, instantly forms a comfortable protective shell around your knee Stretch mesh back with an elastic strap over the calf to keep the pads from moving PADLOCK connection system attaches to the Evo Short to keep the pads in place Internal silicon printing on top and bottom elastic