MSR TrailShot Pocket Filter Review (2026) — Best for Shallow Water

Squeeze filters need you to scoop water into a bag, which is impossible at a shallow trickle or a seep. The TrailShot drops a weighted hose into as little as an inch of water and pumps directly, which turns marginal sources into usable ones. It weighs 5oz, fits a jacket pocket, and delivers about a litre a minute with steady squeezing. It is more work than a gravity filter and the hand pumping gets tiring for large volumes.

Check current price →

$60 retail

8.4

/10

TrailCraft Score

What Works

Draws from shallow water squeeze filters cannot access
Filters directly into a bottle or your mouth
5oz and pocketable
Field-cleanable by shaking
Fast for small volumes

Limitations

Hand pumping is tiring for group volumes
More moving parts than a squeeze filter
Must never freeze
No viral protection

At a Glance

Filter typeHollow fiber, 0.2 micron

Flow rate1L/min

Weight5.0oz / 142g

Capacity2,000L rated

IntakeWeighted hose

CleaningShake to clean

WarrantyMSR limited

Score Breakdown

Value for Money

8.2

Flow Rate

8.2

Ease of Use

8.6

Durability

8.4

Portability

8.8

What Sets It Apart

Late-season water sources are the argument. By August in the mid-Atlantic, springs that ran well in spring have shrunk to a trickle across rock, and there is no way to scoop that into a squeeze bag. The TrailShot's hose sits in the trickle and pumps, which turns a dry-looking source into a usable one and can meaningfully change route planning.

A hand pump with a drop-in hose that draws from an inch of water

Who This Is For

Late-season hikers, anyone in areas with marginal water sources, day hikers wanting a pocket filter, and trail runners.

Note: Prices are current as of August 2026. Some links are affiliate links.

Also Consider

MSR Guardian Purifier — , $350
Sawyer Squeeze Filter — , $40
Platypus QuickDraw Microfilter — Best Flow Rate, $45

See the full comparison

All 9 options in this category ranked side by side.

View Full Comparison →

Common Questions

Can I drink directly from it?

Yes — squeeze and drink from the outlet, or pump into a bottle. Drinking directly is convenient at a source and slower for filling.

How does it handle silty water?

Better than a squeeze filter because the weighted intake sits above the bottom. Very silty water still clogs the fibers, so pre-filter through a bandana.