The PX 3.1L is an ultralight running and trail vest that feels like a second skin and carries your essentials without pressure or bounce. It belongs to a new category between a belt and a classic backpack: minimal, non-compressive, and designed for complete freedom of movement.

The Instinct PX 3.1L is the perfect companion when you want to carry your essentials safely, quickly accessible, and without bounce—from fast sessions to long distances to marathons.

Model Number: IN-BAG-PX

Details:

• Quick access, stable fit: The vest sits higher on the back, giving you instant and effortless access to hydration, nutrition, poles, or adjustments without disrupting your running rhythm.
• Very lightweight, clear structure: Only about 160 g with a volume of 3.1 l – ideal for short to medium-length runs, long training sessions, or even marathon distances without weighing you down.
• Individually adjustable: Variable chest straps and a unique elastic side lacing system allow for very precise adjustment to different body shapes – for maximum comfort and stability.
• Well-designed pockets and carrying systems: Space for several soft flasks, food, rain jacket, safety kit, smartphone, headlamp, or poles – logically arranged so you can quickly grab them while running.
• Breathable and running-friendly material: Lightweight honeycomb mesh provides ventilation and quick sweat wicking without compromising durability.
• Runners who don't want to struggle with weight or compression during races or long runs. Trail and road runners who need clean organization and quick access despite minimal packing volume.
• Anyone who wants a true performance lightweight instead of a belt or heavy backpack.

Material:

• 100% polyester

Weight:

• approx. 170 g