- ECCO. 831714-52600. TRACK 25 M SHOE. BISON. A bold walking shoe that's tough enough for the street or the trail. Soft, supple uppers crafted from premium full-grain leather and oiled nubuck wrap around the foot. The GORE-TEX waterproof lining keeps the worst of the weather out for drier feet. Internal unique ECCO Comfort Fibre System circulates cool air for all-day freshness. A robust platform using our specially-designed dual-component PU and TPU combination for every-step stability.