Instintict Trail PX 3.1L w/flasks

Instinct Trail PX 3.1L w/Flasks

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The Instinct Trail PX 3.1L w/Flasks is a groundbreaking, ultra-lightweight, minimalist running vest that blurs the line between vest and belt. With a total volume of 3.1 liters and a weight of only about 160 grams, the PX vest offers a bounce-free, non-compressive fit that fits like a second skin – designed for running where freedom and pace are a priority.

Designed for trail and road running , the vest is particularly well suited for workouts of around 1 hour to around 20 km or up to a marathon . The high placement on the torso provides immediate and intuitive access to fluid, energy, poles and adjustments – all without interfering with your running stride or breathing.

This version includes 2 × 600 ml soft flasks , placed at the front in dedicated hydration pockets with elastic compression and self-locking cords , making it easy to drink on the go. Together they provide up to 1.2 liters of fluid , while keeping weight down and maintaining stability.

The PX 3.1L uses a unique elastic side lacing system combined with two adjustable chest straps on sliding rails , allowing for precise adjustment in both height and width – even while running. The result is absolute freedom of movement, unhindered breathing and high stability , regardless of body type.

The material consists of a lightweight and breathable honeycomb mesh , which effectively transports heat and moisture away without compromising durability. Despite its minimalist format, the vest holds everything you need: energy, rain jacket, safety kit, mobile phone, headlamp and running poles.

The Instinct Trail PX 3.1L is therefore an ideal choice for runners who want to let go of the belt, think more easily and focus entirely on running .

Features & Benefits

Ultralight running vest (~160 g) – almost unnoticeable while running

3.1 L packing volume – for the most essentials

2×600 ml soft flasks included – up to 1.2 L of liquid in the front

Bounce-free & non-compressive fit – fits like a second skin

Quick and intuitive access to fluid, energy and equipment

High placement – does not interfere with breathing or running steps

Features

Front:

2×600 ml hydration pockets with elastic compression

2× large energy pockets (approx. 500 ml)

1× shoulder pocket (approx. 100 ml) with whistle

Vertical rod attachment left/right

Back:

1× upper horizontal pocket (approx. 500 ml) – quick access to rain jacket

1× lower horizontal pocket (approx. 300 ml) for safety kit/headlamp

Elastic compression cords with autolock

Fit & Adjustment:

2 adjustable chest straps on sliding rails

Elastic “double-S” side lacing for on-the-fly adjustment

Technical specifications

Volume : 3.1 liters

Weight : approx. 160 g (without contents)

Size : One Size (adjustable)

Liquid : 2×600 ml soft flasks included

Material : Breathable honeycomb mesh

Rod compatible : Yes (front mount)

Compatibility : Ergo Quiver-ready (quiver not included)

Suitable for

Trail running, road running, tempo runs and competitions up to the marathon – when you want maximum freedom of movement, minimal weight and zero bounce .