Men's ECCO Track 25 Low GTX - Bison/Bison Track 25 celebrates one of our greatest heritage successes: 25 years with the same silhouette, with updated leather. DETAILS: Uppers consist of breathable full-grain leather combined with durable oiled nubuck GORE-TEX waterproof construction ensures dry and comfortable feet in wet weather conditions Removable leather-covered inlay sole with ECFS™ for increased air circulation and optional extra width Direct-injected two-component sole consisting of P.U midsole and T.PU outsole Light, flexible, and very comfortable sole with outstanding grip