Arcteryx Men's Iser Jacket Ski Shell. Designed for the descent-focused demands of on-area skiing and boarding, the streamlined Iser Jacket delivers protection and performance. Constructed from waterproof, windproof 3L GORE-TEX® fabric with GORE® C-KNIT™ backer technology, the Iser is light, quiet, comfortable and has excellent breathability. The helmet compatible DropHood™ provides full coverage with an integrated insulated collar for extra warmth and protection. Side zips offer ventilation, and a powder skirt seals out driven snow.