The KUHL Parachute Jak™ is made with super lightweight Pertex® Shield for the right balance of breathability, waterproofing, and lightweight pack ability. Pertex® Shield 2.5 Layer fabric consists of a face fabric (what you touch on the outside) which has a waterproof membrane laminated to the back of it. An ever-so-slightly-raised printed pattern is then applied to the inside of the jacket to protect the laminate. 2.5-layer garments are 100% waterproof, are lightweight and easily packed, and offer reasonably good breathability. The fit and finish of the KUHL Parachute Jak™ set it above all other 2.5 layer garments with DWR finish and sealed seams reinforced with nylon tape. KUHL adds water resistant zippers and hood and bottom hem cinches for performance and fit. Zippered hand pockets to keep your stash secure and it all packs into its own stuff sack.