Mega version offers an EE width as well as increased room all around the arch area. Equipped with a GORE-TEX waterproof-breathable membrane. Techno VR adjustable calf system. An elastic panel adjacent to the entry zipper allows a bind free zip and improved fit. Double stitched in all high stress areas. Removable arch support. All bolt on parts are replaceable. Perforated Teflon treated nylon lining. Top grain leather construction.  The patented and trademarked Vertebra System protects the rider?s Achilles tendon. Replaceable thermoplastic resin ankle ball protection cup. Bolt on (no Velcro!) replaceable, adjustable and aerodynamic nylon scuff pads on the toe. Composite inner sole. Removable arch support. Replaceable nylon shin deflector plate. Lorica outer construction. Closable air vent. Double stitched in all high stress areas. All bolt on parts are replaceable. New elastic panels adjacent to the entry zipper allow a bind free zip and improved fit. Dual compound sole. DuPont polymer toe shift pad. Perforated Teflon treated nylon lining. Shock absorbing heel cup. Techno VR adjustable calf system.