The Pak-A-Roo Parka by Outback Trading is made of a Nylon Ripstop material with Durable Water Repellent (DWR) Finish. Seam sealed. Waterproof. Excellent urban, suburban, country or travel raingear. Zipper plus storm panel front closure, drawstring waist customizes fit. Adjustable cuffs and zippered side pockets, snap-open gusseted back vents. The stowaway hood inside the collar has a lockable elastic shockcord that can be pulled and secured around the head. Mesh lining to the waist with taffeta below and inside the sleeves. Hidden asset: scrunches into its own built in backpack for travel or storage. Just unzip and shake out when unexpected showers occur. Unisex Sizing. How the Pak-A-Roo Works: Be sure your Pak-A-Roo is completely dry. Open the inside back zipper. Using your fingers, guide the jacket into the zipper with a scrunching motion. Soon the backpack emerges. With a little shaping, it's ready and your Pak-A-Roo parka or duster can be worn or stowed almost anywhere, kept clean and handy for unexpected showers. Theres also enough extra room in the backpack to provide waterproof protection for gear such as water bottles, cameras, binoculars, snacks, maps, socks, gloves, etc.