MSR Trailshot Microfilter

MSR Trailshot Microfilter is rated 4.6 out of 5 by 53.
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4.6 Star Rating

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Product Description Item No.   10334729

The MSR Trailshot Microfilter is a water filter for moving fast on the trail. Whether on foot or bike, running, or just those that like to be quick about their adventure, this pocket-sized pal will fit in the stash pockets of your pack. Grab it, drink directly from the source via hose, then tuck it away and you're off on the trail again. Filtering 1 liter of water in 60 seconds, it gets the job done. Only weighing a total of 5 ounces, it's won't add extra weight.

FEATURES of the MSR TrailShot Microfilter

  • Sized to easily fit in stash pockets, jacket and clothing pockets, and small packs or belts
  • Allows you to drink directly from water sources on the trail for quick hydration
  • Can also be used to fill water bottles, vessels, or hydration reservoir with clean water
  • Requires no set-up, and the simple one-handed operation can filter one liter in a mere 60 seconds
  • Simple to clean with a few shakes to help restore flow rates in the field; no tools required
  • Practically weightless weighing in at 5 ounces / 142 grams
  • Tested to meets U.S. EPA drinking water standards and NSF protocol P231 for removal of bacteria (99.9999%), protozoa (99.9%), and particulates
  • Made in USA

- + Product Specifications
Features: Made in USA, Field Cleanable, Ultralight
Weight: 5.2 oz
Dimensions: 6 x 2.1 in.
Filter Rate: 1 liter / minute
Ultralight: Yes
Awards: National Geographic Adventure Gear of the Year Award - 2016
Disclaimer: We only ship this brand to US Addresses.
Best Use: Hiking, Mountaineering and Alpine, Trail Running
Effective Against: Protozoa and Bacteria
Filter Type: Pump
Rated 2 out of 5 by from NO I used this for the first time on a backpacking trip. While I liked the size and how light weight it was that was where it ended. The first and second use it worked well, though my friend used his Katadyn Hiker Pro and it pumped 3L to my 1L and I was envious as I fought off the horrendous mosquitoes but flaunted the weight difference! The third time I tried to fill, the hose was short for our water source and kept kinking at the filter connection point (thank God it was warm and I wasn't dealing with ice cold water as I tried hold it in a good place/position) but it had also already started to slow. I tried shaking it, maybe I wasn't doing it hard enough, but could not get good flow. As mentioned the mosquitoes were horrible, we were frustrated, and ultimately my friend just filled my containers so we could move on. Taking this thing back immediately.
Date published: 2018-08-05
Rated 5 out of 5 by from Great 1 Person Filter This is a great filter for 1-2 people. It is so simple to use, and has a surprisingly quick flow rate. It worked great and is super lightweight and compact, perfect for going on longer backpacking trips. Highly recommended.
Date published: 2018-07-21
Rated 5 out of 5 by from Small & filters fast but easy to clog I've trail tested this several times and so far I've been happy. It does what it says - light, small, and fast to purify water. The 1L per minute claim is true. I found it sometimes difficult to balance the filter and a bottle of water while also not sucking up dirt and clogging the filter.
Date published: 2018-07-17
Rated 5 out of 5 by from Light and convenient I'm really impressed with this product. It's light enough to be worth carrying on semi-remote mountain biking day trips and efficient enough to carry on longer outings.
Date published: 2018-07-12
Rated 5 out of 5 by from Great filter Bought this to replace a heavier filter. Love the small size and ease of use. Wish I bought it sooner. Highly recommend. Bring it on all hikes now.
Date published: 2018-06-29
Rated 5 out of 5 by from Best solo filter I've used this on a few trips now, hands down my favorite filter for solo use. I don't think I'd use this for more than two people, as pumping (or squeezing I guess) gets old quick, but for a liter at a time this thing is the best. It really shines with low water sources. It's always such a pain to fill up the bags or bottles with the be free or saywer at when they cannot be fully submerged, but with this filter you can just drop the hose in and go.
Date published: 2018-05-30
Rated 3 out of 5 by from Does the job but it's kind of terrible I've used a Sweetwater pump for years and I've been pretty happy with it, and in the last couple years I've been using an MSR gravity filter that I've also been pretty happy with. I saw this on sale at my local store and bought it because it's so much lighter and smaller than either of those two filters, and I've been working on reducing my pack weight. On a four-day ultralight backpacking trip this past weekend (36 liter pack!) I took this for the first time into the woods. I immediately loved how tiny it was, but that's the only thing I loved about it. It's extremely slow - even on a completely fresh filter it took several minutes to pump a liter of water - and difficult to use. The pumping action depends on you squeezing the pump with your hand, but you have to juggle keeping the tiny hose in the water source, while holding your water bottle exactly so that it will line up with the angled spout of this thing. It's a lot of wasted energy that could be simplified with a slightly longer intake hose and an actual output hose. The flow also slows much more quickly than with either of the other filters I use, which I guess is to be expected given the tiny size of the filter. To its credit, it is super easy to "backflush" (really more of a shake than a proper backflush), but I do wonder how effective the backflush is since it doesn't really push water through the filter in the opposite direction. I may try this with a longer inlet hose, but I expect that this will be relegated to emergency water filtration duty, and my gravity filter will continue to be my primary lighter-weight filter solution.
Date published: 2018-05-23
Rated 5 out of 5 by from Great product The trail shot is extremely light and have drank from many streams and lakes not getting sick once. It can fill a camelback fairly quickly. Definitely worth the money
Date published: 2018-05-04
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How do you know when the filter has reached its maximum cleaning capacity to operate at full functionality? Also, can you/should you backwash the filter?

Asked by: Dean
Hey Dean, Thanks for the question. You can backwash this by shaking it! As for checking the filter, MSR recommends doing the following steps to check it's functionality: 1. Hold the filter at about 45° and prime it by squeezing the Bulb (G)10 times. 2. Pump 3/4 liter of water into a bowl or pot. 3. Unsnap the Prefilter (M) from the Female Check Valve Housing (L) (put it in a safe spot). 4. Unscrew the Female Check Valve Housing from the Male Check Valve Housing (J). 5. Remove the Check Valve (K) and reverse its direction. Place it back into the Female Check Valve Housing. 6. Screw the Female Check Valve Housing back onto the Male Check Valve Housing. 7. Remove the Spout (B) and Umbrella Valve (C). 8. Place the Cap (D) into the bowl/pot of clean water and pump 1/2 liter of clean water backward through filter. 9. While the Cap is still submerged, squeeze and hold the Bulb. Then remove the Cap from the water and release the Bulb. 10. If Bulb re-inflates within 30 seconds, the filter is NOT SAFE. (NOTE: If a few bubbles escape the Check Valve, unscrew the Female Check Valve Housing, reseat the Check Valve, and screw the Female Check Valve Housing back onto the Male.) Then test the filter again. 11. If Bulb stays compressed, the filter is safe to use.
Answered by: Rocko Gigsby
Date published: 2018-02-11

How to store for the season?

Asked by: Seabreeze
Thanks for the question! Below are the pack & storage instructions for your filter. I also included a link to the manual. Hope this helps! 1. Remove Prefilter from water. 2. Squeeze Bulb to purge excess water. 3. Replace Clean Side Cover. 4. Before long-term storage, remove Filter Cartridge (See “Replacing the Filter Cartridge”) and let Bulb and Filter Cartridge dry out at room temperature for at least one week. 5
Answered by: Foxxy Cleopatra
Date published: 2017-08-28

It is "field cleanable to restore flow" - but does the filter ever need to be changed? If yes, how much are they?

Asked by: Dave
Hi there Dave! The MSR Trailshot's filter does need to be changed after filtering 2000 liters of water. We do carry the replacement filters: Happy hydration!
Answered by: Rocko Gigsby
Date published: 2017-09-12
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