The Cloudflash is the latest racing flat from On Running. While its shares a philosophical connection with the original Cloudracer, it is brand new, designed from the ground up. The upper is thin closed mesh with just enough fused overlays to lend structure and support.
A thin tongue is perforated for breathability with a smooth lining and stretchy gusset enhancing the fit and comfort. A small heel counter securely anchors the rearfoot. The midsole features a wafer-like Pebax® nylon speedboard, and a slender layer of EVA to give a touch of cushioning to the ride. The outersole features updated Clouds, saving weight by their low-profile and more minimal design. The Cloudflash's ride is designed for speed, and as such, makes it best suited to races that are taken at full flight.
Sizes: Men 7–13,14; Women 5–11
Weight: Men 7.9 oz. (size 11); Women 6.3 oz. (size 8)
Fit: snug heel, close forefoot
Construction: Strobel slip-lasted
Range: efficient runners: up to 30K possibly a marathon; heavy strikers: between 5K and 12K