HydraPak PackFlask+ (750ml) - Harness Mounted Filtration Water Bottle for Backpacks - Hands-Free, Easy-Access, Ultra-Light, Collapsible Pack Softflask with Filter for Hiking & Backpacking

["INSTANT ACCESS: Stretch mesh pouch attaches to your park harness and securely holds the bottle for hands-free hydration.","FAST & SAFE FILTRATION: The integrated filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from approximately 1500 liters of water at a rate of >1L per minute.","PACKABLE: Sized for easy integration with the pouch, the empty PackFlask bottle packs small–just flatten, roll, and stash it away.","LIGHT AND TOUGH: Lighter than traditional bottles, and made of durable TPU with RF-welded seams.","INCLUDED BACKFLUSH ADAPTER: Plugs into filter valve and threads onto a bottle of clean water for backflushing the filter to restore flow rate."]