From the manufacturer

The Sawyer Squeeze Filter is the lightest and most versatile filtration system on the market. With a total field weight of 3 ounces and ability to roll up, it takes up virtually no space in your pack. The Squeeze filter is perfect for traveling abroad where tap and bottled water cannot be trusted.

Ideal for hiking, camping, hunting, fishing, emergency prep, or traveling abroad, Sawyer's Squeeze Water Filter ensures access to clean water in the backcountry or anywhere in the world. Rated to 0.1 micron absolute filtration, the Squeeze Filter removes 99.99999% of bacteria such as salmonella, cholera, leptospirosis, and e. Coli, and removes 99. 9999% of protozoa such as giardia and cryptosporidium (independent testing laboratory Hydration, LLC.; microbiological report S05-03). The Squeeze Filter also filters out 100% of microplastics.

Included:
1 Squeeze Filter
2 1L pouches that can be reused hundreds of times
1 inline adapter
1 syringe
1 mesh bag/tubing for a gravity system