7Mesh updates their all-around all-day bibs with a redesigned upper for greater comfort and a new fabric construction for better compression to keep muscles firing on all-day rides. Compared to the WK2, the WK3 Bib Short has an improved bib design with wrap-around coverage to help support your core when you're hammering away up the climbs. The wide-set straps still allow for hassle-free pit stops, while staying nicely in place while you're pedaling.