MSR HyperFlow Backcountry Water Filter

- High flow rate allows you to pump more than 3 liters/minute or one liter every 20 strokes - Hollow Fiber filter meets NSF Protocol P231 for the removal of 99.9999% of bacteria and 99.9% of protozoa from beginning to the end of filter life in 'worst-case' water - Ultralight and compact design makes it easy to bring on every adventure, even when space is at a premium - Quick Connect bottle adapter conveniently lets you filter water directly into a variety of containers, including all MSR hydration products and other wide-mouth bottles - Filter is easily field maintained to keep a high flow rate throughout the life of the cartridge. Field maintenance kits for seals and replacement cartridges available separately - Storage bag utilizes a PFAS-free DWR coating that is better for the environment and still keeps your gear dry - Weighs just 7.8 oz. (221 g) and measures 7x3.5 in. ( 17.8 x 8.3 cm) makes it easy to take along even when space is at a premium. Made in the USA

From the manufacturer

Mountain Safety Research

MSR HyperFlow Microfilter

MSR Purifiers & Filters

Safe Water Starts With Science

MSR has always been a company of engineers, inventors and unruly dreamers. Larry Penberthy started the company in 1969 on a personal crusade against unsafe equipment. Today, we’re still an intrepid team obsessed with creating the most reliable, high-performance gear possible. We believe the greatest innovations are inspired by and made for the world’s unruly dreamers and their explorations.

Photo By: Scott Rinckenberger

Pumps more than 3 liters per minute or one liter every 20 strokes.

Ultralight at just 7.8 oz. (221 g). and ultra-small at just 7x3.5 in. ( 17.8 x 8.3 cm) makes it easy to take along even when space is at a premium.

Hollow fiber filter meets NSF protocol P231 for removal of protozoa and bacteria. Treats up to 1500 liters.

Made in the USA of US and Imported Materials.

From our fast-and-light microfilters to our gravity-powered systems, we apply the latest technologies and rigorous testing to assure you safe water on every adventure.

We invest in an on-site water lab with staff scientists, and individually test our devices to ensure they deliver greater safety and ease of use.

Every MSR filter and purifier features: