In a word, reliable. The Yonex Power Cushion 50 indoor court excels thanks to its Hexagrp outsole design, Power Cushion midsole and Ergoshape design. Hexagrip outsole is a flagship for Yonex's indoor court shoes because of its ability to grip the court effectively. Power Cushion delivers exceptional comfort as you step in and out of shots and the Ergoshape design scientifically contoured for added comfort and stability.