ykk zippers Do you need a two-way zipper on your hiking jacket? What is the point of two-way zippers, and should you be looking for one on your next hiking jacket? Why does all your outdoor gear have YKK zippers? What is a YKK zipper? And why are they on every piece of gear you own? We find out more about this stalwart of the outdoor industry Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors MOST READ1Red 30L Waterproof Roll Top Dry Bag Backpack review: a seemingly simple dry bag that's worth a closer look2New Yetis in the wild – limited edition color for the brand riding a wave of popularity3Vivobarefoot gets back to nature with Ecological Survival Collection hiking shoes4Tourist nearly flattened at Grand Canyon after mobbing frightened elk for photos5Casio launches tough new G-Shock Gravitymaster watches inspired by jet fighter geometry