ECD Echo Lacrosse Arm PadsSo comfortable youll barely know theyre there. So protective youll barely know the defense was there. The Echo Arm Pads harden on impact, stretch with your every move, and grip to your arm making these the perfect pad for players who get it done all over the field. Hardens in Impact Powered by SmartFlex, these arm pads harden on impact to keep you protected while dodging through the most aggressive double teams. Stretches for Comfort Echo Arm Pads are