It's as easy as stop, drop and cinch. Just stand in the middle of stashable changing mat, drop your wet gear and then cinch it all up to keep the dirty wet stuff isolated. The Cinch Mat works great for surfing, mountain biking, skiing, snowboarding - basically any scenario where you're changing out in a hurry. Let your imagination run wild. If your bag gets dirty, Dakine recommend hand washing with mild soap (like Nikwax Tech Wash), cold water and a soft bristle brush. If hand washing is not going to do the trick, use a front loader washing machine. To ensure your backpack doesn't get tangled, place inside a pillowcase or mesh bag before washing. Always use cold water, mild soap and run on a gentle cycle. Never bleach your pack. Hang to dry in a warm but shady place, ensuring both inside and out are dry before storing. Details: 600D polyester, stashable changing mat, cinches up to store wet gear, stows away in built in stuff sack, carabiner clip, limited lifetime warranty. Dimensions: 35'' diameter, stash pouch 9.5'' x 5.5'' x 2.5'' (24 x 14 x 6cm). Material: Polyester.