The Zeal RB9X from Icebug achieves the holy grail of trail runners: a combination of stability and flexibility no other shoe can match. The Holy Grail Midsole Soft and Stable (HGMS2) technology combined with the highly durable upper provides the fit and feel trail runners are searching for. Features of Icebug Zeal RB9X Trail Running Shoe - Mens: * Nylon upper provides durable comfort & support * HGMS2 provides a stable heel grip on the medial side of the shoe * Midsole cradle provides a superb fit that protects against trail debris * Slightly lowered heel cup reduces pressure on the Achilles tendon * RB9X sticky rubber provides great traction with a mud repelling tread design 1385