Regatta Pack It Jacket II - AW17 IsoLite 5000 - Strong, lightweight, breathable and waterproof. Durable Water Repelant Finsih - For that extra bit of waterproofing. Stuff Sack - Stuffs into a sack for unbelievably easy storage. Taped Seams - For added durability and comfort. Two Zippered Pockets - For added convenience.