Outdoor recreation gear and sporting goods Retailer REI started selling Altra Running shoes in the past year .
Each year since 2011 , Altra Running has doubled their sales revenue and over 1500 retailers are now selling their zero - drop , foot - shaped toe box shoes .
Outdoor recreation gear and sporting goods Retailer REI started selling Altra Running Running shoes in the past year .
Each year since 2011 , Altra Running has doubled their sales revenue and over 1500 retailers are now selling their zero - drop , foot - shaped toe box shoes .