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Select Filters and Purifiers

Select Filters and Purifiers

Enjoy safe, clean water anywhere in the world with Sawyer Select Water Filters and Purifiers which remove virtually all contaminants found in fresh water while also improving taste and odor. These systems combine a proprietary foam membrane in an durable silicone bottle with our 0.1 micron hollow fiber filter at the top — ensuring access to clean water in the backcountry, while you travel, at the office, or for emergencies.

The Foam Adsorption Technology used in these systems was developed with a partnership with Foamulations LLC to now be able to safely remove contaminants like heavy metals, chemicals, pesticides, and viruses while also improving taste and odor. Adsorption filtration is the process in which molecules adhere to the surface of the adsorbent foam membrane. This highly advanced filtration and purification process, combined with our 0.1 micron absolute filter will ensure that any and all particulate or pathogens above 0.1 microns are filtered out of your water, including bacteria, protozoa, cysts, dirt and sediment.

See Select Filters and Purifiers Video Here



Select Filters and Purifiers
  • S1 Foam Filter


    • Bacteria
    • Protozoa
    • Chemicals
    • Pesticides
    • Taste & Odor
    # of Uses


  • S3 Foam Filter


    • + Heavy Metals
    • + Viruses
    • Bacteria
    • Protozoa
    • Chemicals
    • Pesticides
    • Taste & Odor
    # of Uses


How to Use

  • Step 1

    Unscrew the filter, fill the bottle to the Max Fill line, then screw the filter back onto the bottle.

  • Step 2

    Squeeze the bottle in an alternating motion for 10 seconds.

  • Step 3

    Drink directly from the filter or dispense water into another container.

Which Select System is Right for Me?

  • S1 Foam Filter

    John is hiking the Lone Star Trail in Texas and is worried about pesticides from agricultural run-off. He is taking the S1.

    Larry is a youth pastor taking a team to Fiji and is staying in a hotel. He wants to make sure his team is drinking safe water so each person is carrying an S1.

  • S3 Foam Filter

    Sally is traveling abroad and is concerned about industrial pollutants in the water. She is taking the S3.

    James is prepping for a natural disaster and wants a filter he can use in case the water supply is contaminated so he chose the S3.


The Select systems reduce chemicals down to 0.5 parts per billion (up to 40 times lower than the EPA’s maximum recommended level) and reduce pesticides down to 0.01 parts per billion (400 times lower than the EPA’s maximum).

The Select S3 models go even further, purifying contaminated water from suspect sources:

Select S3 filters out 99.99% of viruses and reduces heavy metals such as lead, copper, arsenic, and mercury down to 0.5 parts per billion (up to 260 times lower than the EPA’s maximum).

Completely drying out the the Select Bottle is not necessary. The adsorption filtration technology within the foam is designed to both filter water as well as prevent growth. If you do dry it out and mold grows on the unprotected walls of the bottle, fill the bottle with water and continuously squeeze and release for approximately 3 minutes or until the mold is gone.

The Details

Kit Includes

  • Select Foam System with Silicone Bottle and Reducer Cap
  • 0.1 Micron Absolute Sawyer Micro Squeeze Filter
  • Cleaning Plunger
  • Cleaning Coupling


Volume:20 oz of water output
In Packaging Dimensions:
Weight:1.125 lbs in Packaging / 10 oz field weight


Product #:SP4120, SP4320
UPC: 050716041200, 050716042207, 050726043204

360° Product View


  • Q: ViewAre there any long term storage instructions for the Select filter or purifier?

    You can store the bottle with either the Micro Squeeze filter or included white cap screwed on top of the bottle. The proprietary ingredients in the foam will make sure that your foam does not grow bacteria or develop an odor. Please do not compress these systems for long term storage. Store your bottles fully expanded to ensure that you do not inadvertently shorten their life.

    If you want to dry out your bottle for packing weight reasons (it can save approximately one ounce), store in a dry room with the lid removed and the moisture will eventually evaporate out. Be aware that after you dry the bottle out, your first bottle will produce much less water than normal since our foam is hydrophilic (meaning it attracts water) and will want to hold onto some no matter how hard you squeeze. Repeat steps for first use when you want to use your filter again.

  • Q: ViewAre the filters and purifiers tested and approved?

    Our filters and purifiers have been tested by independent and qualified research laboratories according to EPA standards for water filter and purifiers.

  • Q: ViewCan I freeze the filter?

    While we have no proof that freezing will harm the filter, we do not have enough proof to say it will not harm the filter, therefore we must say that if you suspect the filter has been frozen, to replace it — this is especially true with a hard freeze.

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  • Amazon
  • Bass Pro Shops
  • Cabela’s
  • Dick’s
  • Menards
  • Moosejaw
  • REI Co-Op
  • Walmart

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