After previewing initial designs late last year, adidas has now debuted the adizero Prime BOOST. The performance running shoe features a lightweight black, white and red knit upper with no-sew Three Stripes branding. Differing somewhat from the initial prototypes, the production model features an external heel counter for added support. Completing the package here is the ultra-comfortable BOOST sole. Look for these now at select retailers including Caliroots.