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  • MSR - TrailShot Microfilter  - One Color

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  • MSR - TrailShot Microfilter  - One Color

MSR TrailShot Microfilter


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    • One Color, One Size

    10 Reviews


    Pocket-sized purification.

    From ultralight backpacking trips to epic mountain bike rides, the MSR TrailShot Microfilter provides ultra-compact purification, allowing you to drink directly from streams and lakes on the trail. Tipping the scales at a mere 5.4 ounces, the TrailShot tags along in your pack without the bulk or weight of traditional water filters.

    The one-handed pump action efficiently filters water of common contaminates, including bacteria, protozoa, and suspended particulates. When it's time to clean the filter itself, simply shake it a few times and get back to filtering water from the stream or lake. It treats up to 2,000 liters of water before requiring a replacement and cleans one liter of water in a mere 60 seconds.

    • Ultra-compact water filter for outdoor adventures
    • 5.4-ounce weight satisfies ultralight backpackers
    • One-handed pump action with shake-to-clean design
    • Filters out bacteria, protozoa, and particulates
    • Meets NSF Protocol P231 filtration standard
    • Treats 2000 liters before needing replacement
    • Filters one liter of water in 60 seconds
    • Item #CAS009O

    Tech Specs

    Purifying Element
    hollow fiber technology
    bacteria, protozoa, particulates
    Cartridge Life
    up to 2000L
    one-handed pump
    Field Cleanable
    shake to restore flow
    Claimed Weight
    Recommended Use
    hiking & camping, backpacking, ultralight backpacking
    Manufacturer Warranty
    limited 3 years

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    On the GO

    • Familiarity: I've put it through the wringer

    Got this for a friend who is an ultra runner. If staying fast and light is your goal for a day on the trail then this is an amazing option. If you get a chemical taste initially there are a few different methods to get rid of it. I personally do water and lime juice (or some type of citrus) to help retract the chemical taste.


      I bought this as a backup to my Be Free filter,and the water that has come out has tasted so badly of chemicals that it was completely unusable.Sad,because the size and operation are great.No choice but to return it.BTW,the taste did not improve after 12 liters of water through it.

      Super convenient

      • Familiarity: I've used it several times

      This thing is awesome, super small and lightweight! It was quick to pump and feels very durable and like a quality piece of equipment.
      The only thing I noticed is the first couple times that you use it the water did seem to taste more chemically. once you runs a few liters through and wash it out and shake it clean it does a phenomenal job! Pick one up ASAP

      MSR trailshot

        I got this as a backup to my Katadyn Be Free filter which is great.This filter flows quickly,but the chemical taste of the water was so strong,I couldn’t drink it.Probably going to return it if it doesn’t get much better inside the next two or three liters.

        Necessary addition to the quiver

        • Familiarity: I've used it several times

        Email me directly with all your MSR questions -

        The Trailshot is a perfect purifier for fastpacking, ultra running, or minimalist backpacking. Fast and super easy to use.

        Necessary addition to the quiver

        Lightweight Great All Around Filter

        • Familiarity: I've used it several times

        Filtering water can be a production sometimes, but not with the MSR TrailShot! It weighs only 5 oz, but is extremely easy to use and has a very efficient design.

        The TrailShot is the perfect filter for a solo hiker or even multiple people, who don't have a lot of time to waste to stop and filter water. Built like a lot of pump filters - the TrailShot has a straw that sticks into the water and a hand pump. The hand pump is much smaller than normal filters and is similar to a blood pressure hand pump. What sets the TrailShot apart from other hand pump filters is that it only weighs 5 oz and it still pumps about a liter of water per minute.

        You have several pumping options with the TrailShot. You can drink straight out a water source with it, pump it directly from the water source into your bottle or bladder, or pump it into the filter and save it for later. Because it is pocket-sized, you can easily access it, kneel down, pump your water, and move right along.
        I have several water filters, but this is by far my favorite design. I find this even easier to use than the Sawyer Squeeze because you don't have to fill one of their bags up with water or clean them when you are done.

        To clean the TrailShot, after you are done filtering your water, pump a few more squeezes of water into the filter and shake it for 30 seconds, then dump it out. If you do this, you will rarely have to clean it and it will last much longer.

        Bottom Line: This is a great filter for a great price. I would recommend this to anyone other than someone who is responsible for filtering for a large group.

        Awesome Lightweight filter!

        • Familiarity: I've used it several times

        This filter is a perfect for solo backpacking or hiking/trail running where you don't want to carry much water weight. At 5.4 oz it's one of the lightest water purifiers on the market while still being quick and efficient! I find that I'm able to easily filter a liter of water in around a minute, which makes it super easy to refill water at sources throughout the day making, meaning I rarely have to carry more than a liter of water at a time. Overall I'm extremely satisfied and would highly recommend to anyone looking for a lightweight/personal water filter!

        Excellent Water Filter

        • Familiarity: I've used it once or twice and have initial impressions

        I used this water filter last weekend over 3 days in the Alpine Lakes Wilderness. It was a major weight/space saving, and I was able to filter 1L of water in about a minute. I was also able to filter from a pool of water only 1 or 2 inches deep. Another excellent product from MSR.

        MSR TrailShot Ultralight Water Filter

        MSR’s ultralight TrailShot water filter is ultimate backcountry filter for fast-paced, high-mileage adventurers like trail runners, hikers, fast-packers and mountain bikers. This tiny water filter lets you drink directly from sources you find along the trail, and fill your vessels with clean water. Quick to deploy, it removes bacteria and protozoa, delivering 1 liter per 60 seconds. The TrailShot microfilter lets you quench your thirst, fill your bottles and get back on the trail quickly.

        Major weight savings

        • Familiarity: I've used it once or twice and have initial impressions

        I'll post a more detailed review when I've used the MSR Trail Shot a few more times.

        It's 1/3 of the weight of my old Pur Hiker & 1/2 the size. It's probably going to replace my Pur on solo excursions.