PUMA have updated the midsole on the Velocity Nitro 4 from the previous dual foam build to a single NITROFOAM construction which makes it lighter, more responsive and faster feeling underfoot. A GORE-TEX invisible fit membrane provides waterproof, windproof and breathable coverage for excellent protection from the elements. In the outsole PUMA have used the durable compound rubber PUMAGRIP to give multi-surface traction you can trust.