PGuard technology: Improves durability OrthoLite sockliner: Sockliner that provides cushioning performance and moisture management for a cooler, dryer environment. WINGWALL technology: Improves stability AHARPLUS outsole: ASICS' pinnacle high abrasion resistant rubber located in the heel area that is approximately three times more durable than standard outsole rubbers. Rearfoot GEL technology: Shock-attenuating material placed in the midsole of the shoe for cushioning and shock absorption.