MSR thinks gravity should do the work.
After a grueling uphill trek, affix the MSR Hyperflow Gravity Kit Bladder to your MSR Hyperflow Pump and filter for easy, pump-free filtering courtesy of gravity. The Hyperflow Gravity Kit Bladder fills up with clean water without the effort of pumping, so your mind can meander like the stream filling your bottle.
This product includes only the MSR Gravity Kit Bladder. Does not include filter.
Item #CAS0497
Material: rubber, nylon, plastic
Volume: 4 L
Recommended Use: using gravity to fill your bottle
Manufacturer Warranty: limited lifetime
