The Sonic jacket uses the PointZero fabric is windproof and has a DWR (Durable Water Repellancy treatment) improving its weather protection and stain resistance. The PointZero fabric has an incredibly low pack size and so folds up into its own collar. The Sonic Jacket is the full length zipped version of the Sonic series. A superlight breathable ultra packable wind jacket. Only weighing 54g.