The Grid Omni Walker offers an unsurpassed fit similar to the Omni 5 running shoe. Soft leather upper for great support and flexibility. Visible Rearfoot Grid System consists of a woven configuration of Hytrel filaments which provide superior cushioning and stability by centering the heel on impact. Forefoot HRC(High Rebound Compound)is a responsive EVA/rubber compound which provides cushioning through the later stages of the gait cycle. HRC Strobel Board. Midfoot Support Bridge. Removable, premium sockliner. SRC Impact Zone. Rubber outsole. Measurements: Weight: 13 oz Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.