Our no. 1 sneaker of 2014 just got a serious upgrade in the form of the adidas Pure Boost ZG Prime.

We first previewed this sneaker in January, and now the next-gen of Pure Boost has arrived. This model mixes a full-length Boost midsole with a layer of EVA on the outsole to produce what adidas calls a "floating sensation," hence the 'Zero Gravity' (ZG) part of its name.

That's not the only key feature here, as this version of the Pure Boost ZG also features a Primeknit upper for a cozy and adaptive sock-like fit. It's then finished off with leather tabs at the tongue and heel, adding a premium touch to an otherwise sporty silhouette.

If for some reason this Primeknit variation isn't quite your cup of tea—or out of your budget—there's also a less expensive mesh-based version dropping this summer.

The adidas Pure Boost ZG Prime is now available in black, black/red, and blue from adidas.com for $140 apiece.