LifeStraw Flex with Gravity Bag

LifeStraw Flex with Gravity Bag is a powerful 2-stage water filter that provides safe drinking water in any environment.  Easily removes bacteria, parasites, and microplastics while reducing lead and chemicals to keep you and your family safe.  The hollow fiber membrane is good for 2,000 liters (500 gal), while the replaceable carbon filter lasts 100 liters (25 gal).

The versatile LifeStraw Flex can be used in 5 ways:

  • Use as a personal straw
  • used with the Soft Touch Bottle
  • adaptable to plastic water bottles
  • attached to a hydration bladder
  • or attached to the Gravity Bag


  • Hollow fiber membrane: 0.2 micron pore size. Removes 99.999999% of bacteria, 99.999% of protozoa, and 99.999% of microplastics
  • Carbon fiber capsule: Improves taste while reducing lead, other heavy metals, chlorine and organic chemical matter (Pesticides, Herbicides, VOC).
  • Also removes turbidity (silt, sand, cloudiness)
  • Exceeds the following standards
    • US EPA drinking water standards for bacteria and parasites
    • NSF 42 standard for chlorine reduction
    • NSF 53 standard for reduction of lead and other heavy metals
  • Longevity/Lifetime: 2,000 liters/500 gallons (hollow fiber membrane) 100 liters/26.4 gallons (replaceable carbon capsule)

LifeStraw Flex - Usage Options


  • Compact, easy to use and carry
  • Caps are dishwasher safe
  • Recyclable
  • Filter Size: 6.24 x 1.5 in
  • Filter Weight: 2.0 oz
  • Volume: 1 gallon / 3.7 liters
  • Weight: 5.3 ounces
  • Material: Nylon fabric with TPU lining
  • Kit Includes: LifeStraw Flex filter with carbon capsule, 1 gallon / 3.7 liter gravity bag w/ quick connect hose and backwashing syringe

Replacing the Carbon Capsule in your LifeStraw Flex:

Unscrew the filter from the lid and gently remove the old carbon capsule. The capsule will be at the top of the filter between the HFM and the lid. Insert the new LifeStraw Carbon Capsule Replacement Filter into the straw and press firmly until it's secured. Discard the used one.


LifeStraw Flex with Gravity Bag
LifeStraw Flex with Gravity Bag

LifeStraw Flex with Soft Touch Bottle
LifeStraw Flex with Soft Touch Bottle

Lifestraw Flex Gravity Bag Outdoors-1
Flex Carbon Capsule Replacement Filter
LifeStraw Flex in Soft Touch Bottle 2
Lifestraw Flex - Personal Straw Option
LifeStraw Flex on Plastic_Bottle