What Our Gearhead(R) Experts Are Saying:"This upgrade kit is a simple and lightweight way to improve my gravity filter setup. It lets me use the fast-flowing BeFree filter with my existing Katadyn Base Camp system, which makes filtering large amounts of water way easier on group trips."For those of us who rely on Katadyn gravity filters for group hydration, the Katadyn Explorer Pro Upgrade Kit is a smart way to enhance efficiency and versatility. This kit allows us to upgrade our Gravity Camp 6L or Base Camp Pro 10L systems to work with the fast-flowing BeFree filter, giving us access to quicker, easier water filtration on extended backcountry trips. The adapter ring and quick-release valve are simple to install and lightweight, adding barely any weight to our pack while improving functionality. The quick-release valve also features an automatic outlet stop, making water transfers more convenient. Paired with the BeFree filter element (sold separately), this upgrade kit transforms our existing setup into an even more reliable hydration system for adventures with friends and family.