The Adidas Hyperboost Edge HK running shoes use Hyperboost Pro foam without a plate or stiffening element, letting the foam move naturally through the gait cycle instead of steering the stride artificially. A PRIMEWEAVE upper and LIGHTTRAXION outsole round out that ride with a structured, breathable fit and dependable grip, built for everything from easy daily miles to a harder training push. What Our Gearhead(R) Experts Are Saying:"I expected a stack this tall to feel unstable or mushy underfoot, and instead it just rolled through the stride the same way a lower-profile shoe does. I stopped thinking about the cushioning after the first mile."