Ultralight upper northwave have introduced lightweight unibody uppers to their range using thermowelding to replace stitching this allows for the use of lighter and thinner material and almost complete elimination of stitching this results in a more anatomical fitting that better envelopes the foot hence a more comfortable shoe jaws sole ideal if you want a technical product combined with comfort plus you get the grip you need with natural rubber so clambering up muddy slopes will not be a