SealSavers Zip-On's are a revolutionary design that allows for quick and easy installation and cleaning without having to remove your forks from the triple clamps. They act as a pre-wipe, wiping away dirt, dust and mud that has accumulated onto the forks, and preventing it from getting into your fork seals as your forks compress. The SealSavers Zip-On has a unique dual-flap zipper protection system that is utilized to protect your forks from the nylon zipper. When installed and the protection flaps are sealed, Zip-On's look almost identical to the original SealSavers Zip-On and offer the same great protection. The SealSavers Zip-On's protect the seals from dust, dirt and mud. SealSavers Zip-On' are durable and washable and will not effect your fork damping or preload.