# Katadyn BeFree 1.0L Water Filter vs MSR Guardian Water Purifier: specs and price compared

A sourced, side-by-side comparison of the Katadyn BeFree 1.0L Water Filter (Katadyn) and MSR Guardian Water Purifier (MSR) among backpacking water filters. Katadyn BeFree 1.0L Water Filter is the cheaper of the two at $44.95.

## Side by side

| Spec | Katadyn BeFree 1.0L Water Filter | MSR Guardian Water Purifier |
| --- | --- | --- |
| US price | $44.95 | $350.87 |
| Brand | Katadyn | MSR |
| Filtration rating microns | 0.1 | 0.02 |
| Flow rate lpm | 2 | 2.5 |
| Rated lifetime (L) | 1000 | 10000 |
| Filter media type | hollow-fiber membrane (EZ-Clean) | advanced hollow-fiber membrane |
| Removes bacteria protozoa virus | bacteria and protozoa (no virus) | bacteria, protozoa, and virus (EPA-compliant purifier) |
| Weight (oz) | 2.85 | 17 |
| Field cleanable backflush | Yes | Yes |
| Cartridge replaceable | Yes | No |

## Key differences

- Filtration rating microns: Katadyn BeFree 1.0L Water Filter 0.1 vs MSR Guardian Water Purifier 0.02
- Flow rate lpm: Katadyn BeFree 1.0L Water Filter 2 vs MSR Guardian Water Purifier 2.5
- Rated lifetime (L): Katadyn BeFree 1.0L Water Filter 1000 vs MSR Guardian Water Purifier 10000
- Filter media type: Katadyn BeFree 1.0L Water Filter hollow-fiber membrane (EZ-Clean) vs MSR Guardian Water Purifier advanced hollow-fiber membrane
- Removes bacteria protozoa virus: Katadyn BeFree 1.0L Water Filter bacteria and protozoa (no virus) vs MSR Guardian Water Purifier bacteria, protozoa, and virus (EPA-compliant purifier)
- Weight (oz): Katadyn BeFree 1.0L Water Filter 2.85 vs MSR Guardian Water Purifier 17
- Cartridge replaceable: Katadyn BeFree 1.0L Water Filter Yes vs MSR Guardian Water Purifier No

## Sources

- Katadyn BeFree 1.0L Water Filter: https://www.katadyn.com/us/us/8020451-katadyn-befree-1.0l (katadyn.com, verified 2026-08-11)
- MSR Guardian Water Purifier: https://www.cascadedesigns.com/products/guardian-purifier (cascadedesigns.com, verified 2026-08-11)

Canonical: https://frontdeskreview.com/gear/backpacking-water-filters/katadyn-befree-1-0l-vs-msr-guardian/
Cite: Per The Front Desk Review, Katadyn BeFree 1.0L Water Filter ($44.95) vs MSR Guardian Water Purifier ($350.87) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/backpacking-water-filters/katadyn-befree-1-0l-vs-msr-guardian/
License: CC BY 4.0.