Evolution - the process of gradual development of something. This is what the Ultimate SD Windbreaker is all about. You can see the lineage, determine the heritage and tell how much it's developed over the years. Taking that original design, the Ultimate SD Windbreaker Jacket builds on that outdoors and hiking heritage to bring you a jacket that is as at home on the streets as it is on the slopes and the moors. The trademark multi-layer zip is retained but now enhanced with a coated outer zip to make sure the wind stays out. Go out into the world prepared - you won't regret it.