Instintict Trail Ambition 4.5L w/flasks

Instinct Trail Ambition 4.5 L w/bottles

See our entire range from Instinct here!

The Instinct Trail Ambition 4.5 L w/flasks is the new standard for ultra-distance running in a minimalist format . Developed for runners who want maximum speed, freedom of movement and instant access , the vest is perfect for training and racing from around 10 to 70 km . Compact, refined and performance-oriented - Ambition feels so natural to the body that it is almost forgotten while running.

This version comes with 2×650ml soft bottles , placed high up front for quick and easy hydration on the go. With its high fit, adjustable sternum straps and Instinct's unique elastic side lacing, you get a bounce-free feel and unrestricted breathing , even at race pace.

Key features

Volume: 4.5 L

Included: 2×650 ml soft bottles

Weight: approx. 190 g

Fit: One Size (unisex)

Minimalist & performance-focused design

High seating position for direct access to fluid, energy and adjustments

Compatible with Ergo Quiver

Front storage & shoulder straps

2×650 ml hydration pockets with elastic compression and auto-lock (soft bottles included)

2×500 ml energy pockets with internal elastic cord

• Right: extra zipper pocket
• Left: overlapping pocket

1×100 ml shoulder pocket with safety loop, whistle and elastic loop for upper pole attachment

Back & rear storage

1×700 ml horizontal top pocket with elastic compression – access to rain jacket without taking off vest

1×700 ml horizontal bottom pocket – quick access to safety kit, headlamp, gloves etc.

1×horizontal rear sleeve – perfect for rain pants, long-sleeved shirt or poles

Rod solutions & adjustment

Multiple pole carrying options

• Front: vertical right & left
• Rear: horizontal

2 adjustable chest straps on 20 cm rails - precise fit in height and width

“Double‑S” elastic side lacing with auto-lock – easily adjust on the fly

Elastic compression cord for top pocket at back

Materials & comfort

Very light and breathable honeycomb mesh

Effective moisture wicking even at high intensity

Designed for minimal body contact and maximum running feel

Area of application

Instinct Trail Ambition 4.5 L w/flasks is ideal for:

Races and training 10–70 km

Fast trail runs where low weight is crucial

Ultrarunners who want to run with only the essentials

Runners looking for a “next-to-skin” feel

Why choose Instinct Trail Ambition 4.5 L w/flasks?

Ambition is the vest for runners who want to run light but smart . It combines extremely low weight with well-thought-out storage, high stability and intuitive access. With soft bottles included, it is ready to go straight away – and delivers maximum pace from start to finish.