Katadyn BeFree 1.0L Water Filter

Engineered for fast-paced solo adventurers tackling diverse trails, from the foothills to high-altitude passes, this collapsible filter bottle is perfect for ultralight backpacking, trail running, and day hiking. The integrated system eliminates the need for pumping or waiting, allowing you to fill from a stream, screw on the filter, and drink immediately—a critical advantage for maintaining hydration and momentum. With its certified removal of bacteria and protozoa commonly found in Himalayan water sources, it provides reliable protection against waterborne illness. Its BPA-free, collapsible Hydrapak flask minimizes pack weight and space, making it an essential piece of ultralight camping gear for backcountry.

Key Features 

• Filtration Medium: 0.1-micron hollow fiber filter (EZ-Clean Membrane™) .

• Flask Material: Collapsible 1.0L flask made from BPA-free and taste-free Thermoplastic Polyurethane (TPU) .

• Flow Rate: Up to 2 liters per minute when the filter is clean .

• Thread Size: 42mm wide-mouth opening for easy filling from shallow sources .

• Cleaning Method: Field-cleanable by shaking or swishing the filter in clean water; no backflushing tools required .

• Drink Nozzle: Cap-covered “Stay Clean” nozzle to protect against dirt and debris between uses .

• Compatibility: The filter threads are compatible with other Hydrapak brand bottles and reservoirs featuring a 42mm opening .

Key Points 

• Unmatched Speed-to-Weight Ratio: Delivers one of the fastest flow rates (2L/min) among personal water filters while maintaining an ultralight total system weight of just 63 grams, a balance rarely achieved by competitors .

• Ultimate On-the-Go Simplicity: The fully integrated “fill and drink” design requires no assembly, pumping, or separate dirty water containers, offering the most straightforward hydration solution for active, individual use .

• Easy Field Maintenance: Unlike many microfilters that require syringes for backflushing, the BeFree’s exposed fiber design can be effectively cleaned with a simple 30-second shake, restoring flow rate without tools .

• Award-Winning & Expert-Recommended: Recognized as a top performer by leading outdoor gear review sites for its high flow rate, light weight, and packability, making it a trusted choice for serious adventurers .

Technical Specifications 

• Manufacturer & Model: Katadyn BeFree 1.0L Water Filter .

• Manufacturer Part Number: 8018006 .

• System Weight: 63 grams (2.3 ounces) including the 1.0L flask and filter . *Note: The filter-only weight is approximately 34 grams (1.2 oz) .*

• Packed Dimensions: 10.8 cm (L) x 7.6 cm (W) x 25.4 cm (H) / 4.25″ x 3″ x 10″ .

• Flask Capacity: 1.0 Liter .

• Filter Pore Size: 0.1 microns .

• Filter Lifespan: Up to 1,000 liters (264 gallons), dependent on source water quality .

• Filtration Efficacy: Tested to remove 99.9999% of bacteria (e.g., Klebsiella terrigena) and 99.99% of protozoan cysts (e.g., Giardia and Cryptosporidium) . Does not remove viruses or chemicals.

• Operating Temperature: The wet filter must not be allowed to freeze, as ice formation will damage the hollow fibers .

• Warranty: 2-year manufacturer warranty .