FEATURES & DESIGN: The Alpha carries the same Isometric head shape as the 8th gen EZONES and revolutionary Minolon material for enhanced vibration dampening The Yonex EZONE Alpha also includes Vibration Dampening Mesh inside the handle to create an arm-friendly experience The new Yonex EZONE Alpha comes pre-strung directly from Yonex and ready for play ISOMETRIC(TM) technology delivers greater control without sacrificing power O.P.S (Oval Pressed Shaft) is designed to give players more spin, control, and feel. The shaft flexes at impact, increasing dwell time and minimizing vibrations