Saucony Women's Pro Grid Echelon 2 Running Shoe Synthetic and mesh Rubber sole Lightweight Saucony Super Lite EVA midsole offers maximum rebound and durability. Heel ProGrid with ResponTek cushioning technology absorbs shock for softer steps. Super Rebound Compound Impact Zone delivers a smooth heel-to-toe transition. Synthetic leather / mesh upper, polyester mesh upper lining, brushed polyester sockliner... Comfortride insole, SSL EVA (full-length) midsole with Heel ProGrid, etc.