Men's K-ST 21 Low

Size Guide

Street sneakers infused with kinetic suspension technology.



When does a shoe stop being a shoe and become equipment? When it has suspension. Because suspension turns force into propulsion. And when you strap into the K-ST 21, you strap into an atom on a sugar high full of propulsion.  There’s a laboratory full of “What’s that for?” happening in the K-ST 21 and it begins at the heel. The plush, angled heel catches you and immediately transfers downward energy into forward momentum.The heel also is the first point of contact to a wide platform (aka sole) resulting in unstoppable stability. The heel immediately rocks you into the midfoot where it is amplified by our who’s-the-nutter-who-came-up-with-this? Carbon Bow Technology™ suspension system. The Carbon Bow transfers the energy into the toe box. This roll completes the rocker, sending you off into your next step. Pair all of this with enhanced grip as well as an upper that hugs you like grandma does and the K-ST 21 gives you more than you ever knew you needed. How you use it is up to you, but no matter which way you move, you’ll never go from A to B again.


•    Anatomic, gender specific medium width performance running last
•    Cordura® ECO fabric and Matryx® upper for unparalleled durability and light-weight breathable foothold 
•     Adjusting fit lycra tongue and toe box
•    Under Foot Geometry: 120 - 80 - 100 mm, 4.5 mm drop, 16.5 - 21mm stack height 
•    Xponent+ Midsole featuring IM EVA foam and Carbon Bow Technology™ suspension system
•    Extended angled heel with Meta-Rocker geometry that delivers an uptempo and propulsive ride
•    Sticky rubber outsole for active grip
•    Removable insoles for personal tuning: 1) Anatomical, closed cell PU plush memory foam with silky smooth lycra lining and perforations for added comfort and 2) Anatomical, open cell EVA memory foam with ultra low compression set Poron® heel crash pad for an ultra shock-free cushioned ride

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