Comfort collaranatomically shaped collar is flexible and breathable yet supportive for excellent comfort and fittpu heel supportextra support in heel provides excellent stabilityfull grain leather saddleultra premium leather saddle for ultimate performance durability and qualitymoulded comfort eva sockliner provides a moulded fit for longlasting comfort and supportleather pull tabeasy on off and adjustment of comfort tongueignite foamrevolutionary and proprietary new foam provides energy return