Stretch upper designed to fit like a second skin. Low foam density lets your foot feel connected to the ground. Heel-to-toe grooves allow multi-directional flexibility. Asymmetrical lacing system is placed on the side to relieve pressure on your instep. Bootie construction integrates the tongue to provide a snug, seamless fit. The absence of a heel counter gives freedom to your heel area while providing lockdown. Sockliner is designed to give your foot a close, connected feel to the ground. Double hot-knife cuts on the outsole and side of the midsole flex to give optimal flexibility with every step. Rubber pods on the forefoot and heel enhance traction.