MSR TrailShot Trail Base Filter Cartridge & Maintanence Kit

Refresh your MSR filtration on the go

When you’re deep in the backcountry, reliable hydration matters. The MSR TrailShot Trail Base Filter Cartridge & Maintanence Kit is designed to keep your TrailShot Microfilter and Trail Base Gravity Filter performing at their best. Instead of chasing replacement parts separate from your trip, this kit provides a straightforward way to service your filter and restore smooth water flow. The result is less time spent pumping and more time enjoying the scenery, with water that feels clean and ready for your next adventure.

What’s inside and how it helps

• replacement filter cartridge
• small maintenance parts
• clear, easy-to-follow instructions for servicing TrailShot and Trail Base filters

The hollow fiber filtration technology at the core of this cartridge helps water pass through while blocking sediments, so your sip can stay crisp. At around 1 ounce in weight and a compact 3 by 1 inches footprint, it’s easy to tuck into a pack or hydration kit without adding bulk.

Replacing the cartridge can refresh the filter’s flow and overall performance, making backcountry filtration more predictable on varied water sources. The cartridge is designed to deliver up to about 2,000 liters of use, depending on the water conditions you encounter on the trail.

Durability, warranty, and real-world use

MSR backs this kit with a manufacturer’s 3-year limited warranty, offering peace of mind for extended treks, weekend expeditions, or family camping trips. Whether you’re filtering from a rushing stream or a still pond, a refreshed cartridge helps maintain steady performance when you need it most.

Practical tips for use and storage

• Store spare cartridges in a cool, dry place
• Include this kit in your hydration setup so you can swap on-site if needed