HydraPak UltraFlask+ 500ml - Filtered Compressible Soft Flask Water Bottle for Hydration Vests and Running Packs with Integrated Water Filter (500ml / 17oz)

- FAST & SAFE FILTRATION: Included 42MM Filter Flask Cap removes 99.99% of E Coli & Parasitic cysts. Filters approximately 1,500 liters of fresh water at a rate of >1 L per minute.* - HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing. - COLLAPSIBLE FLASK: Soft material conforms to pockets, and shrinks as you drink to reduce movement and pack away easily when empty. - INCLUDED BACKFLUSH ADAPTER: Plugs into filter valve and threads onto a HydraPak Stow or bottle of clean water for backflushing the filter to restore its flow rate. - BEYOND LIFETIME WARRANTY: If you experience any issue, we’ll repair or replace the item for free. Whatever it takes to keep your adventure going.

From the manufacturer