EvoShield - About Our Gel to Shell Technology:Integrated with EvoShields Gel-To-Shell Technology for personalized protection the Pro-SRZ-1 Batters Elbow Guard helps you remain covered comfortable and confident as you stand inside the batters box this season. The elbow guard is also outfitted with Dispersion Technology which actively spreads energy across the surface of the shield to minimize felt impact.About EvoShields Technology:EvoShield Elbow Guards provide unparalleled personalized protection. Our Gel-to-Shell technology utilizes Air Activated Dispersion Technology to minimize the impact and increases the protection of your elbow.