Precision Fuel & Hydration Soft Flask - 500ml

This is a 500ml Precision Fuel & Hydration Soft Flask. When you are moving fast on trails, every gram matters and every second counts. A rigid bottle in a vest pocket bounces, sloshes, and stays bulky long after it is half-empty. The PF&H Soft Collapsible Flask solves all of that. Lightweight, squeezable, and designed to collapse as you drink, it is a practical hydration flask purpose-built for trail running, swimrun, and any discipline where carrying fluid on your body is the only option.

At 500ml capacity, it holds exactly the right amount to pair with a single PH electrolyte tablet, making it a natural match for athletes who are already using the Precision Fuel and Hydration range and want a carry solution that fits their existing hydration strategy.

Why a Soft Flask Over a Rigid Bottle

Rigid bottles in running vests and harnesses create pressure points and bounce against your body as fluid levels drop and the bottle becomes unevenly weighted. A soft flask collapses progressively as you drink, reducing internal air space and keeping the flask fitted snugly against your body with minimal movement. This makes a noticeable difference on long efforts where comfort and consistency matter.

The squeezable body also allows you to control flow precisely at pace, so you can drink quickly without slowing down or breaking stride.

Built for the Conditions Australian Trail Runners Face

Trail running in Australia often means heat, technical terrain, and sections well away from aid stations where carrying your own fluid is non-negotiable. The PF&H soft flask is lightweight enough to carry comfortably across long distances and durable enough to handle the kind of use that comes with rough trails, rocky descents, and multi-hour efforts in variable conditions.

The wide-mouth opening makes it easy to fill quickly at aid stations and drop in a PH electrolyte tablet without fuss, even when you are tired and moving quickly.

Key Features

• 500ml collapsible soft flask, collapses progressively as you drink
• Lightweight construction reduces pack weight and bounce on the run
• Squeezable body for fast, controlled drinking at race pace without slowing down
• Wide-mouth opening for easy filling and tablet or powder mixing at aid stations
• Pairs directly with PH electrolyte tablets dosed at one tablet per 500ml
• Low profile when partially full, sits comfortably in running vest pockets
• Suited to trail running, swimrun, ultramarathon, and any discipline requiring on-body hydration

Who Is It For?

The PF&H Soft Flask suits trail runners, ultramarathon athletes, swimrun competitors, and any endurance athlete who carries fluid in a vest or harness rather than on a bike. It works particularly well for runners in Australia where heat and remote courses make reliable, portable hydration a priority rather than an afterthought.

Athletes who primarily train on the road or bike and carry bottles in cages are better served by the standard PF&H ergonomic bottle or flow bottle. The soft flask is built specifically for on-body carry where flexibility, low weight, and collapse-as-you-drink performance are what matter.