This Ultra Boost 3.0 is set to be especially popular thanks to the grey Boost unit underfoot. It's the first time for this sought-after running silhouette and given the hype for coloured sole units, it's not going to be an easy cop.That full shade of grey is complimented by a lighter shade of grey to the Primeknit. Thanks to the knitted construct of this material, it showcases hits of black woven through. This not only looks good but feels unbelievable too.The same tonal shade of grey hits the lace surround and also features to the laces. As always, classic Ultra Boost branding is marked at the heel and also comes stamped to the tongue.