So comfortable you'll barely know they're there. So protective you'll 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. PERFORMANCE TECHNOLOGIES: Hardens in Impact: Powered by SmartFlex(TM), 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 engineered with auxetic shapes allowing them to be form-fitting and flexible from warm-ups to the final whistle. Lightweight and Breathable: Lightweight materials and built-in venting make for a pad so light and comfortable; you may have to be reminded to take them off after the game. ADDITIONAL SPECS: Machine Washable: These pads can be thrown in the wash after games and practices to help keep them fresher longer. You're welcome parents.