Altra - Olympus 4 - Trail running shoes. Material type: synthetic|Closure: lacing|Sole: Vibram Megagrip|Running surface: Alpine Trails|Midsole: InnerFlex|Footbed: removable insole|Stack height (heel): 30 mm|Drop: 0 mm|Reference size: medium-sized pair|Running gait: neutral|Extras: reinforced heel|Extras: pull on loops|Extras: protective toecap|Misc: hook-and-loop fastener for attaching gaiters|Cushioning: High|Cushioning: Medium|Running surface: Alpine Trails|Drop: 0