the Altra EGO™ midsole is a touch firmer for extra energy return and response

Durable and lightweight

grounded feel

the customer will be responsible for cost of the return shipping label

Altra’s signature FootShape™ toe box that lets your toes relax and spread out for incredible comfort and freedom

Retro Oso Flaco mens the Altra EGO™ midsole isFor those who demand the best in performance focused minimalist footwear that can handle the BIG adventures, the Oso Flaco is super attractive. Using our specially developed Vibram Megagrip studded tread, we've built a sandal that can handle the complex world of real adventure: mountains, rivers, trails, mud.