Flyknit Trainer Chukka SFB 

Chukka construction. Flyknit fit. 

Designed to beat the elements, the Flyknit Trainer Chukka SFB emphasizes seasonal protection without sacrificing signature innovation.  Blending the fit and feel of Flyknit with the rugged utility of a boot.  The Flyknit Trainer Chukka SFB's upper is crafted with Flyknit threading and a synthetic wool blend for optimal warmth.   The Flyknit Trainer Chukka SFB seamlessly combines a Flyknit upper with a Phylon midsole and rugged outsole to create the purest expression of winterized performance.  Innovation begins at the bottom. Accordingly, the design’s rugged sole-unit features Phylon injections and deep flex grooves for increased traction in any terrain.