Take down the competition with ferocious agility in the New Balance WR800. A middle distance spiked racing flat. Ideal for events ranging from 800m to 3,000m. Ultra lightweight mesh upper for a breathable environment. Synthetic leather overlays provide durable, targeted support. Contoured heel cup for added comfort. ACTEVA midsole is 12% lighter than the standard midsole foam and features DuPont Engage technology for superb durability. Carbon fiber forefoot plate provides impact protection. Pebax spike plate with six removable spikes. Built on a RL-2 last. This last type has a standard toe box width, a standard instep height, and a narrow heel width. Measurements: ; Weight: 5 oz ; Product measurements were taken using size 8.5, width B - Medium. Please note that measurements may vary by size.