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The Sawyer SP4320-S3 Foam Filter effectively removes all major contaminants, providing safe, clean, drinkable water and also improving taste and odour. Available in three models, these systems combine a proprietary foam membrane in a durable silicone bottle with a 0.1-micron hollow fibre filter at the top, ensuring access to clean water whether you're in the backcountry, travelling, at the office, or preparing for emergencies.
The Select systems reduce chemicals to 0.5 parts per billion (40 times lower than the EPA’s maximum) and pesticides to 0.01 parts per billion (400 times lower than the EPA’s maximum). The Select S3 models further purify water by filtering out 99.99% of viruses and reducing heavy metals like lead, copper, arsenic, and mercury to 0.5 parts per billion (up to 260 times lower than the EPA’s maximum).
The foam’s adsorption filtration technology purifies water and inhibits mould growth without needing complete drying. If mould appears, fill the bottle with water, squeeze, and release for 3 minutes or until clear.