The Katadyn Hiker Field Maintenance Kit is an accessory that every water filter owner needs to have. The Hiker Field Maintenance kit allows you to clean and lube your Hiker Microfilter while you're out on the trail or back at home after your trip. The Katadyn Maintenance Kit includes replacement O-rings, silicon lubricant, and cleanable filter protector to increase the life expectancy of your Hiker. A carry bag protects the microfilter and makes the kit easy to pack. Own a water filter? Needs cleaning? Grab a Katadyn Hiker Field Maintenance Kit and take care of your slow running water filter.