Description
The Ultraflask 500ml + Filter Kit is a compact and efficient solution for safe hydration, designed to provide clean water on the move. With a flexible and compressible design, it fits securely in hydration packs and vest pockets, ensuring stability and comfort while reducing bulk as you drink. The 42mm wide opening allows for easy filling at water sources, and the bite valve delivers smooth, drip-free sips with every drink. The secure grip simplifies attaching and removing the filter, while the included backflush adapter restores flow rate for long-lasting use.
Removes Escherichia coli, Cryptosporidium parvum, and Giardia Lamblia from up to 1,500 litres of water at a rate of >1L per minute.*
Flexible structure provides a firm hold for screwing and unscrewing the filter.
Soft materials conform to most hydration pack and vest pockets for stability and comfort.
Bite-activated, self-sealing valve eliminates drips for smooth hydration.
Simplifies filling at streams, lakes, or other water sources.
Reduces water movement and bulk as the flask empties.
Restores the filter's flow rate using a HydraPak Stow or clean water bottle.
*Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42.
Dimensions: 240 mm x 70 mm
Weight: 65 g
Capacity: 500 ml
Materials: TPU, Silicone POM, Hollow Fibre, ABS
Contact us within 30 days of receiving your goods to request a refund or exchange if products are eligible (see: Return Policy).
All packaging or products must be in their original, re-sellable condition.
Outlet sales are final and can only be returned for exchange. Items found faulty or under warranty will be replaced or refunded.
Some special condition products are labelled as No Refund & Exchange Products. Sale of these items are final and are not eligible for neither refunds nor exchanges.
For safety reasons, K2 cannot accept returns on climbing equipment, socks, underwear and some other products unless faulty.
Please check out our refund policy if you need more information.