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Zappos.com is proud to offer the Pearl Izumi - SyncroGuide III (Sea Blue/Limestone) - Footwear: Running shoe built for the severe over-pronator who requires a combination of cushioning and reinforced stability. ; Keep up the pace with the tech-driven features of the SyncroGuide III from Pearl Izumi. ; Mesh upper with synthetic leather overlays and 360° degree reflectivity. ; Seamless Race Upper with forefoot support structure. ; Dual density EVA insole for increased arch support. ; EVA sandwiched full length syncro Stability Frame. ; SKYDEX heel crash pad. ; Segmented forefoot for a smooth, natural, and efficient ride. ; Fill-in midsole/outsole at arch reduces torsional flex for increased stability. ; High Rebound SKYDEX forefoot propulsion pad for long lasting cushioning. ; Hybrid blown rubber and carbon rubber forefoot with carbon rubber heel crash pad. ; Heel to toe offset 12mm. ; 13.00 oz. ; Product measurements were taken using size 8. Please note that measurements may vary by size.