KATADYN BeFree Water Filtration System Introduction

KATADYN BeFree AC

Every drop provides peace of mind in emergencies

Simple, Safe, Lightweight
A portable water purifier with a dual-stage filtration system

A reliable portable water purification partner
for the outdoors or emergency situations

Lightweight and portable,
it is your go-to water purification companion for hiking, trekking, and other outdoor activities.

The hollow fiber membrane removes bacteria, protozoan cysts, and microplastics from water,
while the activated carbon filter reduces odors, chlorine, and turbidity to improve taste.

For use with freshwater only; it does not remove viruses, so supplemental disinfection may be required based on water source risks.

It also serves as a water backup during disasters, water outages, or other emergencies.

Be prepared in daily life so you are ready when it matters most.

— Ideal for outdoor exploration and emergency preparedness —
Just fill, squeeze, and drink.
Keep moving forward
— Pocket-sized water support.

Designed for easy cleaning and maintenance,
with every component meticulously crafted.

Each part can be disassembled individually for simple cleaning and maintenance. By replacing only the necessary parts, the product can serve you for a long time.

One-handed flip-top cap and silicone nozzle
1 Flip-top cap & silicone nozzle
Features a flip-top cap that opens with one hand, paired with a soft, comfortable silicone nozzle for an enjoyable drinking experience.
Replaceable activated carbon filter
2 Activated Carbon Filter
Activated carbon helps reduce odors, chlorine, and turbidity for improved taste. Replace after approximately 200 L of use or 3 months after first use, whichever comes first; actual lifespan depends on water quality.
EZ-Clean hollow fiber membrane filter
3 Hollow Fiber Membrane Filter
The hollow fiber membrane features countless 0.1 μm (0.0001 mm) pores, removing 99.9999% of bacteria and 99.9% of protozoan cysts, as well as microplastics. It can be cleaned by shaking or swishing in water—no backflushing or tools required. Flow rate up to 2 L/min. Filters approximately 1,000 L; actual lifespan varies by water quality. Replace earlier if flow rate continues to decrease or stops.
Hollow fiber filtration range: The 0.1 μm membrane traps protozoan cysts (approx. 3–15 μm), bacteria (approx. 0.5–5 μm), and microplastics 0.1 μm or larger; scale is logarithmic.

Before use: Does not desalinate seawater and cannot remove dissolved chemical contaminants; viruses are not effectively filtered. If the water source is questionable, please boil or chemically disinfect.

Before use: Does not desalinate seawater and cannot remove dissolved chemical contaminants; viruses are not effectively filtered. If the water source is questionable, please boil or chemically disinfect.

Collapsible soft flask
4 Soft Flask
Available in two options for easy carrying: the lightweight Slate Blue and the more durable, double-layered Classic Black. Collapses for compact storage in your backpack when not in use.
Compact and collapsible for easy storage

How dual-stage purification works

Water is first cleared of microorganisms by the hollow fiber membrane, then refined by activated carbon for better taste.

Hollow fiber membrane filterSTAGE 1

Hollow Fiber Membrane

0.1 μm pores trap microorganisms

  • 99.9999%Bacteria removal
  • 99.9%Protozoan cysts removal
Activated carbon filterSTAGE 2

Activated Carbon

Porous structure absorbs odors and improves taste

  • Reduce odors
  • Reduce chlorine
Hollow fiber filtration diagram: Bacteria and protozoa in unfiltered water are trapped by the 0.1 μm pores of the hollow fiber, allowing filtered water to flow through (Illustration, not to scale)
Activated carbon adsorption diagram: Even after hollow fiber filtration, water may retain odors and chlorine; the macro, meso, and micro-pores of the activated carbon filter absorb these substances for a smoother taste (Illustration, not to scale)

Securing a supply of drinking water is the top priority during disasters!
Prepare one for each person for added peace of mind.

When disaster interrupts public utilities, securing access to water becomes a critical task. Each person should prepare 3 L of water per day for drinking and cooking alone.

To store at least a 3-day supply, each person needs 9 L. However, public utilities may not be restored within 3 days; therefore, in addition to pre-storing water, you should be prepared with ways to obtain and treat water sources in an emergency.

The BeFree AC is a lightweight, compact, and easy-to-use portable water purifier. Regular maintenance and familiarity with its operation in daily life will ensure you can use it effectively in an emergency. Activated carbon can absorb odors and improve taste; however, always evaluate your freshwater source and follow the manufacturer's manual—do not rely on smell alone to judge whether water is safe.

BeFree AC Series: Meeting Different Needs

Soft Flasks | Collapsible for storage

Water Bottles | Rigid body, stands upright

KATADYN FOR THE MISSION Swiss Water Purification Brand

A professional water purification brand founded in Switzerland in 1928. As an industry leader, KATADYN's portable water purification products are trusted by users worldwide. Its products have been adopted by military forces and public agencies in numerous countries and have supported rescue operations in natural disaster zones, consistently providing reliable water purification equipment.

A woman drinking water using a BeFree AC portable water purifier outdoors

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