User Review: MSR HyperFlow Microfilter
Source: bought it new
Price Paid: $100
Fast at first, then slow.
- Hard to pump
I went on a 17-day stint on the Appalachian Trail with this filter. The first couple days it was amazingly fast and easy to use. Then it started to clog, even to the point where flow was reduced to 5 min/liter. It barely got me through the trip.