For fast hikes, long trail days, fastpacking missions, and multi-day treks, hydration systems need to do more than carry water. They need to stay accessible, move efficiently with your body, and perform reliably in changing backcountry conditions. The HydraPak PackFlask™ collection was built specifically for lightweight, front-of-pack hydration. Designed to attach directly to a pack harness, PackFlask™ keeps water visible and within reach while moving. The soft flask design collapses as you drink to reduce sloshing and bulk, helping hikers, trail runners, and fastpackers move more efficiently over long distances.

What is the HydraPak PackFlask™?

PackFlask™ is a chest-mounted hydration flask system designed for hiking, trail running, fastpacking, and backpacking. Unlike traditional reservoirs that rely on hoses and rear storage, PackFlask™ places hydration directly on the front of your pack for faster access and easier monitoring water levels.

Key features include:

• Front-of-pack hydration access
• Lightweight collapsible soft flask design
• Secure daisy chain and hook-and-loop attachment system
• Stretch mesh stabilization pouch to reduce bounce
• Self-sealing high-flow bite valve
• Integrated dust cover to protect from dust, mud, and dirty hands.
• Durable abrasion-resistant TPU construction with RF-welded seams

Why Front-of-Pack Hydration Matters

Traditional hydration reservoirs can make it difficult to monitor water intake, refill quickly, or access hydration without stopping. The PackFlask™ system solves this by moving hydration to the front of the body, where athletes can drink, refill, and track consumption more naturally during movement. For trail runners, thru-hikers, mountain athletes, and minimalist backpackers, this creates a more efficient hydration workflow with less interruption and less bulk.

PackFlask+™: Filter on the Fly

For athletes looking to lighten their load further, the PackFlask+™ is a game-changer for self-supported backcountry runs and treks. It includes all the minimalist features of the standard collection, but adds integrated filtration, allowing you to carry less water weight and filter at the source.  

PackFlask+™ filtration specs

• Removes 99.9999% of bacteria and parasites per HSF 42.
• Filters approximately 1,500 liters of water
• Fast flow rate of up to 1 liter per minute
• Includes backflush adapter for restoring filter performance
• 750ml capacity optimized for moving efficiently between refill points

Lightweight Performance for Hiking, Fastpacking, and Trail Running

The HydraPak PackFlask™ collection was engineered for athletes and outdoor users who prioritize efficiency, accessibility, and reliability. By combining lightweight soft flask construction with modular front-of-pack integration, the system delivers a streamlined alternative to traditional hard bottles and hydration bladders.

Whether you are moving through technical mountain terrain, hiking long miles, or building a lightweight fastpacking setup, PackFlask™ and PackFlask+™ are designed to keep hydration simple, fast, and always within reach.