Carry less water and filter on the fly. Building on the innovative PackFlask™ design, this enhanced system features an integrated filter for fast, reliable hydration on the trail. Simply find a water source, fill and drink directly through the high-flow, self-sealing nozzle. The filter screws securely onto the flask, doubling as a squeeze filter for filling bottles or pots at camp. The stretch-mesh pouch securely attaches to your pack harness for hands-free use.

*Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42.

Instant Access — Stretch mesh pouch attaches to your pack 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 1,500 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.

Dust Cover — Protects the nozzle from dust, mud, dirty hands and bacteria. Quickly opens and closes with a single-handed flip.

Light & 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.

• Highlights: Beyond Lifetime Guarantee | Easy to Use | Fits Most Packs | High Flow Rate. 
• Care: Avoid freezing filter. Freezing may ruin the hollow fiber membrane. If in freezing conditions we recommend you keep the filter in your pocket or near your body to prevent freezing.