Compact, lightweight water filtration system which filters up to 2,000 litres (500 gallons). Capacity is 3.8 litres (1 gallon) in the gravity bag.
- Compact and ultralight, the gravity water filtration system weighs 196 g and can filter a gallon of water in less than 10 minutes
- Long-lasting membrane micro filter lasts up to 500 gallons (2,000 L)
- Ultralight with high throughput, weighs only 6.94 oz (0.43 lbs), and capable of filtering 1 liter every 2 mins
- Stage 1: microbiological filter removes:
- 99.999% of bacteria (including E.coli, Salmonella),
- 99.999% of parasites (including Giardia and Cryptosporidium),
- 99.999% of micro plastics
- Stage 2: activated carbon fiber capsule:
- reduces chlorine
- Improves taste and reduces bad odour and improves taste
- reduces lead and other heavy metals
This product gives back: one product, one school child, one year of clean water
















Emily Thompson –
The LifeStraw Flex Water Filter is a game-changer for outdoor adventures. The gravity bag makes it so easy to filter large quantities of water without any effort. Highly recommend it!
Michael Rodriguez –
This water filter is incredibly efficient and easy to use. The gravity bag is a great addition, especially when camping with a group. It’s a must-have for any outdoor enthusiast.
Sarah Johnson –
I was skeptical at first, but the LifeStraw Flex exceeded my expectations. The gravity bag is convenient, and the filtration system works flawlessly. I feel much safer drinking water from natural sources now.
David Martinez –
The LifeStraw Flex Water Filter is a solid product. The gravity bag is a nice feature, but I wish it was a bit more durable. Overall, it’s a great investment for outdoor activities.
Jessica Lee –
I love the portability and efficiency of this water filter. The gravity bag is a brilliant idea, and it works perfectly for filtering water during hikes. It’s definitely worth the price.
Brian Wilson –
The LifeStraw Flex is a reliable water filter, but the gravity bag could be more user-friendly. It’s a bit tricky to set up, but once it’s going, it works great.
Amanda Harris –
This product is fantastic for anyone who spends time outdoors. The gravity bag makes it easy to filter water, and the filter itself is very effective. I’m really impressed!
Kevin Brown –
The LifeStraw Flex is a good product, but I found the gravity bag to be a bit cumbersome. It’s effective, but I wish it was easier to transport.
Laura Davis –
I’m really happy with this purchase. The gravity bag is a great feature, and the filter works quickly and efficiently. It’s perfect for camping and hiking trips.
Steven Taylor –
The LifeStraw Flex is a solid water filter, but the gravity bag could be improved. It’s a bit fragile, and I’m concerned about its longevity. Still, it gets the job done.
Melissa White –
This water filter is amazing! The gravity bag is super convenient, and the filtration system is top-notch. I feel much more confident drinking water from natural sources now.
Emily Thompson –
The LifeStraw Flex Water Filter with Gravity Bag is a lifesaver for outdoor adventures. It’s lightweight, easy to use, and provides clean drinking water in seconds. The gravity bag is a huge plus—no pumping required! Highly recommend for camping or emergency preparedness.
James Carter –
I’ve used several water filters, but the LifeStraw Flex stands out. The gravity bag system is incredibly efficient, and the filter removes even the smallest contaminants. It’s a bit bulky compared to other options, but the performance is worth it.
Sarah Bennett –
This water filter is perfect for hiking trips! It’s simple to set up with the gravity bag, and the water tastes great. My only complaint is that the bag can be tricky to fill in shallow streams. Otherwise, it’s excellent.
Michael Roberts –
The LifeStraw Flex is reliable and effective, but the price is a bit steep. The gravity bag is a nice feature, but I wish it included a carrying case. Overall, it’s a solid product for emergency kits.
Jessica Lee –
I love how versatile this filter is! It works with bottles, hydration packs, and the included gravity bag. It’s perfect for travel and outdoor activities. The water flow is fast, and it’s easy to clean. Definitely worth the investment.