The midsole's supercritical foam formulation delivers an energy return rate of 88%, with less than 2.5% performance degradation over a full marathon, best gym running shoes.

Nucleo 2 GR is the new all-terrain shoe for running on various surfaces, such as gravel roads, grass or clay surfaces, and light trails. The tread design offers greater grip, but is not so deep as to allow stones or debris to become embedded. The upper features denser, reinforced mesh, yet is still breathable.

The overall construction is designed for a neutral foot, allowing for natural movement without correction, good running shoes with cushioning.