MSR TrailShot Pocket Water Filter
MSR TrailShot Pocket-Sized Backcountry Water Filter
- Purpose: Ideal for hiking, camping, traveling, and emergency preparedness.
- Functionality: Allows users to drink directly from water sources or fill bottles/hydration packs; filters one liter in 60 seconds with easy one-handed operation.
- Portability: Weighs only 5 ounces and measures 6×2.4 inches, fitting easily in stash pockets for trail runners, hikers, and mountain bikers.
- Technology: Utilizes hollow fiber technology to filter out harmful protozoa (like giardia and cryptosporidium) and bacteria (like salmonella).
- Effectiveness: Removes 99.9999% of bacteria and 99.9% of protozoa; capable of filtering up to 2,000 liters without the use of iodine, chlorine, or other chemicals.
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Set Alert for Product: MSR TrailShot Pocket-Sized Backcountry Water Filter - $62.95
Last Amazon price update was: March 3, 2025 12:19 PM
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Shirley –
Usato in montagna per filtrare acqua da bere prelevata da un laghetto…. Prodotto affidabile!
billy-wayne joebob –
Clean filtered water on demand, super easy cleaning, highly recommend for backcountry excursions
bobrayner –
Muy poco voluminoso, fácil de usar. Perfecto para las salidas al monte
Brian Cummiskey –
I’m a long-time owner of an MSR MiniWorks. I left it at a family’s house and needed something for a backpacking trip. Saw this and gave it a shot.
FILTRATION: It works well, I’m filtering at least a liter per minute with it. My hand got a bit tired after filling a 3L reservoir and a Nalgene 1L all in one go, but switching hands ameliorated that. You can filter some pretty nasty water and it comes out perfect. There’s a small coarse filter at the inlet of the line, and then you pump the water through the microfiber filter. It gets >>99% of bacteria and protozoa, and it even deals with most viruses unlike the ceramic filters. Only downside is that it won’t filter chemicals at all unlike the ceramics, so areas with a lot of pesticides or the like may be less suited. For the developing world with a lot of human waste, this is the way to go for the virus coverage. The taste is neutral; I didn’t notice any plastic-y hints at all. It also allows you to use it like a LifeStraw which is a feature I enjoyed, and while a Sawyer Mini would allow you to pre-filter a reservoir, it would require multiple fills of the dirty water bag and this can be run continuously.
STORAGE: I keep it in one of my hip belts on my pack which provides for easy access. It took seconds to pull out and put away. The only downside I identified: the soft rubber tube is a bit fragile as evidenced by a few small nicks after my first trip with it, nothing that compromised the inner lumen. I’ll be getting a soft mesh bag to protect it since it doesn’t come with one.
CLEANING: There’s almost nothing to do in the field. They recommend taking off the inlet hose and back-pumping once per six liters filtered to keep the pump reservoir clear of debris buildup; I did this every other time I used the filter. It’s nice to not have to wipe off the filter periodically like you have to with the ceramic cartridge based filters.
STORAGE: The device is easy to take apart. I run clean water through it, disassemble, and let everything dry out before storing. The manufacturer recommends running diluted bleach to sterilize everything between use and long-term storage.
OVERALL: I’m impressed by this device and glad I made the purchase. As long as it lasts, it’ll probably replace my old MiniWorks due to the smaller size/weight, ease of use, comparable filtration rate, and added virus coverage.
Kevin –
This filter was one of the most intriguing items from MSR’s new releases for 2017. And amazingly enough, they actually overstated its weight. Its real weight is 4.90oz (139g), as seen in the picture.
Its fast flow rate makes it a much better option than the Sawyer Mini in my opinion (I hate the Sawyer Mini, first time in the field it took me 10 min to fill a water bottle, no thanks!). I have not tried the Sawyer Squeeze, but I would imagine that the Squeeze is the most comparable in weight and function. The MSR eliminates the need for a “dirty bag” since it has a prefilter, and can be backflushed without a syringe (more on that later). I haven’t personally used the squeeze but ive seen videos and its flow rate seems great, in my opinion this joins the Squeeze as the top tier of backpacking filters. The Squeeze has more adaptability, as you can turn it into a gravity filter, use on a water bottle, etc. The MSR is a more compact package if you plan to simply and put filtered water in a container quickly (and the weight of MSR is less than the total weight of Squeeze/dirty bag/syringe). Both seem to be excellent products. If you do get a Squeeze instead, there are ways to backflush using a specific sport bottle cap (Smart Water Bottle), find the thread from the good people over at backpackinglight.
The cord is 15inch long, and can be detached from both the hand pump and the end-prefilter. The filter comes with a manual/diagram with instructions, using a nice water resistant durable paper that is easy to bring with you if you choose. As a comment below requested, I will upload a pic of this manual. The ripped edge is because I removed the other languages (hey every gram counts). To backflush, use the hand pump until the pump area is half full, cap the top, shake vigorously, remove bottom cord, squeeze water out the back. Then re-attach cord. Very easy and works like a charm.
Not much more to say. It is effortless to use, easy to clean, and has a very fast flow. Very pleased.
Kevin –
I have a guardian and a sawyer squeeze system as well as steripens and aqua mira. This is my new goto filter for wilderness areas where I don’t anticipate high human impact and therefore viruses.
Some have complained the filter clogs quickly and pumps slowly–I have found the *pre filter* can indeed clog easily if you’re not careful. I’ve discovered that it’s usually organic material in a shallow stream. Before I filter, I will stomp and disturb the gravel in the stream bed first–this turns it very brown and murky for a second, but flushes away organic material and makes the prefilter less likely to clog. If I have a hand free, I will also keep my thumb at the intake filter and wipe it between squeezes. This, combined with keeping the intake screen facing downstream eliminates a lot of issues. I’ve been vigorously shaking it every 5-6L to backflush and have experienced standard 60second/L pumping times.
Others also complain that it stops working after drying out–MSR says not to let the filter completely dry out, and if it does, pre-soak it to restore flow.
This is not as convenient as the guardian, but only 1/4 the weight, and still way more convenient than a sawyer squeeze at approximately the weight.
ORoig –
La conception avec un tuyau déporté et une « poire » est très pratique : cela permet de ne pas utiliser de récipient intermédiaire et de prendre même dans un petit filet d’eau à une source.
Le débit est élevé : en une minute environ on remplit sa gourde.
Seul petit point délicat : le rinçage et séchage pour le stockage longue durée. Mais c’est le cas pour tous les filtres.
titti –
I love the light weight. You can put it in a rucsac pocket and forget about it.
Personally, I’m mostly a day-hiker, and I treat this filter as an insurance policy – instead of taking LOTS of drinks “just in case”, I can take 1 litre and if it turns out to be a longer sweatier day (or if the cafe’s closed) this filter saves the day. Ditto for long bike rides in remote areas – now I don’t have to take lots of bidons or a camelbak “just in case”, I only need one or two bidons, plus this filter which slips easily into a toolbag or jersey pocket.
I’m in the UK, where water is already low risk – this just gives peace-of-mind (and maybe filters out some harmless grit). If you were travelling somewhere with bigger risks, probably best to pack a secondary treatment, like water-purifying tablets.