Altra King MT, size 27.5cm. Purchased several years ago and only tried on indoors. These shoes use Vibram Megagrip, providing excellent grip. The sole is thin, and I believe these are unique shoes that allow you to fully experience Altra's signature zero-drop design. The red/black color scheme is quite stylish. I don't see any hardening of the rubber or other deterioration at this time, but please understand that these are aged items. - Brand: Altra - Color: Red/Black - Intended Use: Trail Running Thank you for looking. Trail running Trail run Trail running answer4 teton bros Salomon Hoka One One Altra Pa'lante Packs niketrail Shinetsu Five Mountains UTMF Milestone budo Patagonia Fastpacking Yamato Michi Gossamer Gear Pa'lante