The UltraBoost 4.0 ‘Black’ makes use of a minimalist color scheme, highlighted by a black Primeknit upper with a matching black finish on the midfoot cage and molded Fitcounter heel. Subtle pops of contrasting color appear on iridescent blue three-stripes and Solar Red adidas branding atop the tongue. The lifestyle runner rests on a full-length Boost midsole, reinforced with a Stretchweb outsole made with grippy Continental rubber.