The Pocket Shower is made of the same waterproof fabric and features the same roll top closure as Sea to Summit's standard Dry Sacks. Built into the base is a compact showerhead that operates with an easy to use onoff twist mechanism. The twist spout also serves to adjust the flow of water, delivering an efficient trickle to a free flowing shower. Fill the 10 Liter 2.6 gallon Pocket Shower, roll it to close at the top and hang it from two tough Delrin D rings with the 20 feet of lightweight cord provided. The black fabric soaks up sun during the day at basecamp for a warm shower, or fill it at the end of the day for a cool rinse. Super compact and light: zips into a pouch that measures only 3 in. x 6 in. and weighs just 4.25 ounces. Gives about an 8 and a half minute shower with shower head fully open. Contoured shower head with graduated apertures for equal spray dispersion. Simple and easy to use twist mechanism for turning onoff and for flow adjustment. Bar tack attached Delrin D rings. 20 foot cord included. For multi function, the Pocket Shower can also be used as a regular dry sack to transport clothes or sleeping bag.