Sawyer Products SP128 Water Filtration System

It uses hollow fiber membrane technology with a 0.1-micron rating. This means water passes through tiny tubes that physically block harmful bacteria, protozoa, and microplastics while allowing clean water to flow through.

Yes. The filter is designed to be versatile and can be connected directly to most standard hydration pack tubing, as well as disposable water bottles or the included squeeze pouch.

Backwashing is the process of cleaning the filter by pushing clean water through it in the reverse direction. This clears out trapped sediment and debris, which is essential for maintaining the high flow rate over the product's long lifespan.

No. While it is highly effective against bacteria, protozoa, and microplastics, it does not remove viruses. If you are traveling in areas where viruses are a known concern, you would need to use a chemical purifier or UV treatment in addition to this filter.

That figure is a laboratory rating based on optimal conditions. In real-world use, your mileage will vary based on the turbidity (cloudiness) of the water you filter, but it is widely considered one of the most durable and long-lasting filters on the market.

The filter itself weighs only 2 ounces, making it an incredibly lightweight addition to your gear. It is compact enough to fit in a pocket or the side pouch of a backpack.