Instinct PX 3.1 L Trail Vest & 2 x 600ml Soft Flasks

Born on the trails of the French Alps and race approved around the world, the Instinct PX 3.1L is a simple, lightweight, minimal, non-compressive & no bounce option for carrying your essentials on the Trail.
Recommended for Road & Trail runs over an hour and up to marathon distances, PX is a high-sitting 3.1L hydration vest weighing just 160g. INSTINCT PX combines 1.2L of front-mounted hydration with accessible storage, an adjustable fit and vertical pole carry. Supplied by ICEGRIPPER with 2 x 600ml soft flasks.

Minimal equipment. Maximum freedom.
The INSTINCT PX occupies the space between a running belt and a conventional hydration pack.
It provides enough capacity for hydration, nutrition, a compact rain jacket, phone, headtorch and essential safety equipment while retaining the light, unrestricted feel required for faster running.
Designed for road and trail sessions lasting more than an hour, it is particularly well suited to training runs, shorter trail races and events up to marathon distance where an extensive equipment list is not required.
The lightest vest in the INSTINCT range
At 160g, PX is INSTINCT's lightest trail vest and the starting point for runners who want to carry only the essentials.
Choose PX for lighter and faster outings; or, move up to AMBITION 4.5L or one of the larger INSTINCT vests when additional clothing, hydration or safety equipment must be carried.
A stable, highly adjustable fit
PX sits high on the body, keeping hydration and equipment close to your centre of movement.
Two sternum straps move independently along 20cm sliders, providing both vertical and horizontal adjustment. INSTINCT's double-S elastic side-lacing can be tightened or relaxed while running, helping the one-size vest adapt to different body shapes and changes in clothing layers.
The lightweight honeycomb mesh encourages airflow and moisture dispersal, while the low-contact construction is designed to minimise bounce without tightly compressing the chest.
Front-mounted hydration included
Two high-mounted front pockets keep hydration visible and within natural reach.
Each pocket accommodates a 600ml soft flask, while elastic compression cords with auto-locks help secure the flasks and reduce unwanted movement as their contents are consumed.
ICEGRIPPER supplies the INSTINCT PX with 2 x 600ml soft flasks, providing 1.2L of immediately accessible hydration.
Food and essentials within reach
Two 500ml front pockets provide accessible storage for gels, bars and other nutrition.
A dedicated 100ml shoulder pocket includes an internal retaining loop, providing secure storage for a safety whistle, or other small item such as keys.
This front-focused arrangement allows frequently used items to be reached without removing the vest or interrupting your run.
Rear storage for clothing and safety equipment
The upper rear pocket provides 500ml of storage and is positioned so a compact rain jacket can be reached without removing the vest. An elastic compression cord with an auto-lock and hook-and-loop closure helps keep the contents controlled.
A separate 300ml lower pocket provides space for a headtorch, gloves, arm warmers or compact safety equipment. Its snap-button closure keeps smaller items contained while running.
Front vertical pole carry
Running poles can be carried vertically at the front on either the right or left side.
PX is also compatible with the INSTINCT Ergo Quiver for runners who prefer a dedicated quick-access pole-carrying system. The Ergo Quiver is available separately and is not included.
Made for lighter winter runs
PX is best suited to winter routes where only a compact selection of additional equipment is required.
Its pockets can accommodate gloves, a headtorch, lightweight waterproof protection and compact running traction alongside hydration and nutrition. The limited 3.1L capacity should always be considered carefully when planning exposed, remote or changeable routes.
Place spikes or micro-crampons inside a separate protective storage bag so their metal points cannot damage the vest, soft flasks or other equipment. Choose a larger-capacity INSTINCT vest when substantial spare clothing, emergency equipment or bulky winter traction must be carried.
FEATURES

Vest Type: Minimalist, high-sitting road and trail hydration vest.
Capacity: 3.1L.
Weight: 160g.
Recommended Use: Road and trail runs lasting more than one hour, shorter trail races and events up to marathon distance.
Size: One Size Adjustable - fits all
Fit: Unisex.
Colour: Instinct Black & Yellow.
Soft Flasks Included: 2 x 600ml soft flasks supplied by ICEGRIPPER.
Front Hydration: Two high-mounted 600ml hydration pockets.
Flask Retention: Elastic compression cords with auto-locks.
Accessible Storage: Front nutrition pockets and separate rear clothing and safety pockets.
Adjustable Fit: Two independently adjustable sternum straps mounted on 20cm sliders.
Side Adjustment: Double-S elastic cross-lacing with auto-locks for adjustment while moving.
Ventilation: Lightweight honeycomb mesh promotes airflow and moisture dispersal.
Pole Carry: Vertical front carry on either the right or left side.
Ergo Quiver Compatible: Ergo Quiver 1 (single carry) or Ergo Quiver 2 (dual carry) — quick-access trail running pole quivers, sold separately.


CAPACITY

PX 3.1L EASILY CARRIES:

2 x 600ml front-mounted soft flasks
Gels, bars and other nutrition
Compact rain jacket
Essential safety equipment
Phone
Keys and emergency identification
Headtorch
Lightweight gloves and arm warmers
Running poles
Compact running traction inside a protective bag

FRONTAL SOLUTIONS:

2 x 600ml hydration pockets positioned high for fast, natural access.
Elastic flask-compression cords with auto-locks help secure hydration and minimise movement.
2 x 500ml food and storage pockets for nutrition and frequently used items.
Additional zipped storage for a phone, keys or other small essentials.
1 x 100ml shoulder pocket with an internal retaining loop and safety whistle.
Front attachment points for carrying poles vertically on either the right or left side.
2 adjustable sternum straps mounted on 20cm sliders.

DORSAL SOLUTIONS:

1 x 500ml upper horizontal pocket for a compact rain jacket or lightweight clothing.
Upper pocket positioned for access without removing the vest.
Elastic compression cord with auto-lock and hook-and-loop closure for the upper pocket.
1 x 300ml lower horizontal pocket for a headtorch, gloves, arm warmers or safety equipment.
Snap-button closure helps secure the contents of the lower pocket.
Rear elastic compression system helps stabilise carried equipment.

POLE SOLUTIONS:

Front vertical pole carry.
Poles can be positioned on either the right or left side.
Ergo Quiver Compatible: Ergo Quiver 1 (single carry) or Ergo Quiver 2 (dual carry) — quick-access trail running pole quivers, sold separately.
Running poles, INSTINCT Ergo Quiver, winter traction and all other equipment shown or described are available separately and are not included.

ADJUSTMENTS & FIT:

One-size adjustable construction.
High-sitting fit designed to keep hydration and equipment close to the body.
2 sternum straps mounted on 20cm sliders for independent vertical and horizontal positioning.
2 double-S elastic side-lacing systems with auto-locks.
Side adjustment can be tightened or relaxed while running.
Elastic compression cords with auto-locks help stabilise the rear pockets.
Lightweight honeycomb mesh encourages ventilation and moisture dispersal.
Adjust the sternum straps, side lacing and pocket compression before running.

PROTECTING THE VEST AND CONTENTS
Keep phones, electronics and other water-sensitive items inside suitable waterproof cases or inner bags.
Always place spikes, micro-crampons and other equipment with sharp metal components inside a robust protective bag. Do not allow exposed points to contact the vest fabric or soft flasks.


ADDITIONAL INFO


Product Care - hand wash with lukewarm water, hang and air dry (do not tumble dry)





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