I've been a fan of Adidas's Boost shoes — made with a special type of foam that resembles Styrofoam and is bouncier than standard EVA — since Energy Boost's debut in 2013. In fact, I've run several half marathons in the more-stable Adistar Boost and loved (almost) every mile. So when Adidas announced its newest iteration, the Ultra Boost ($180; available in limited quantities now and in wider release by Feb. 11), late last month, I was all ears. The newest shoe promises 20 percent more cushioning and more stability than the original Boost — plus it's made out of Prime Knit, which is similar to Nike's FlyKnit and features the same socklike feel. It's pretty much everything I love in a shoe — light but stable, with a flexible upper and just enough cushioning — so I'm excited to slip these on before my next long run.
— LS
