Description of Kayland Zephyr Hiking Boots - Women's The Kayland Zephyr is a new boot in the light hiking category for Kayland. The Zephyr features Kaylands's Overinjected System (K.O.S.). The boot combines lightweight, breathable, abrasion-resistant upper fabrics, overinjected with a supportive, protective, ergonomic PU exoskeleton. Features: *Backpacker Magazine's 2009 "Editor's Choice" Award Winner.* Event® Cocona lining Active last Vibram® Mars sole V-K midsole Light insole Injected Cage + Breathable Abrasion Resistant Textile upper 550 grams Level Of Rigidity: 5