Head-to-head · Best Backpacking Water Filters

Katadyn BeFree 1.0L vs Platypus GravityWorks 4L

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Katadyn BeFree 1.0L comes out ahead by a narrow margin (4.6 vs 4.5). The gap is mostly about Trail runners, fast-packers, and ultralight hikers who want the lightest scoop-and-go filter for drinking on the move. — read the strengths below before deciding.

Higher ratedRanked #3 in Best Backpacking Water Filters

Katadyn BeFree 1.0L

4.6

$39.95as of Jun 7

The Katadyn BeFree is the go-to for hikers who want to scoop, drink, and keep moving. CleverHiker named it their best ultralight filter and GearJunkie its best for trail running, both citing an incredible flow rate for such a tiny, light system. The soft flask fills fast and the membrane swishes clean without tools. Its filter life is short and the flask is less rugged, but for fast, light, on-the-go hydration it is the standout.

Strengths

— Incredibly fast flow for its size, ideal for scoop-and-go drinking on the move
— Very light at about 3.4 oz for the whole kit
— Wide-mouth soft flask fills quickly from lakes and streams

Watch-outs

— Short 1,000-liter filter lifespan like the QuickDraw
— Soft flask is less durable and harder to refill from shallow sources
— Flask threading is proprietary, limiting bottle compatibility

$39.95 · Check Price on Amazon Full review →

Ranked #4 in Best Backpacking Water Filters

Platypus GravityWorks 4L

4.5

$135as of May 25

The Platypus GravityWorks 4L is the group and base-camp filter. Both CleverHiker and OutdoorGearLab score it 75 and call hands-free gravity filtration tough to beat for pairs and groups: hang the dirty bag, walk away, and return to clean water. It filters large volumes quickly and has a longer filter life than the personal squeeze filters. It is heavy, bulky, and pricey, so it is the wrong tool solo, but unbeatable for filtering for several people.

Strengths

— Hands-free gravity filtration: hang the dirty bag and walk away while it fills the clean one
— Filters large volumes fast, ideal for groups, couples, and base camps
— Fast treatment time for a gravity system, scoring 9.0 in OutdoorGearLab's flow metric

Watch-outs

— Heaviest system here at 11.5 oz, overkill for solo ultralight trips
— Most expensive filter on this list
— Bulky 4-liter bags take up more pack space than a personal filter

$135 · Check Price on Amazon Full review →

How they stack up

Katadyn BeFree 1.0L

Lighter and faster-filling for on-the-move drinking than the Sawyer Squeeze or Platypus QuickDraw, but shares the QuickDraw's short 1,000-liter life and is far less durable than either; it is a personal flask filter, not a group system like the Platypus GravityWorks 4L.

Platypus GravityWorks 4L

The only hands-free group system here, filtering far more volume at once than the personal Sawyer Squeeze, Katadyn BeFree, or Platypus QuickDraw, but it is the heaviest and priciest; its 1,500-liter filter outlasts the BeFree and QuickDraw while falling short of the Sawyer.

Specs side-by-side

Spec	Katadyn BeFree 1.0L	Platypus GravityWorks 4L
Type	Hollow-fiber flask	Gravity hollow-fiber
Filtration	0.1 micron	0.2 micron
Weight	3.4 oz (kit)	11.5 oz
Capacity	1.0 L soft flask	4 L reservoirs
Filter Lifespan	1,000 L / 264 gal	1,500 L / 396 gal
Removes	Bacteria, protozoa, sediment	Bacteria, protozoa, sediment
Cleaning	EZ-Clean swish, no tools	—
Freeze Safe	No	No
Operation	—	Hands-free gravity feed

← See the full ranking of best backpacking water filters