Pack side 3L Hydration ZipPouch - MTP

The NSN 8465-31-016-0669 represents a specialized 3L Hydration ZipPouch engineered for the French Military's "FELIN" (Fantassin à Équipement et Liaisons Intégrés) combat system.

This "Pack side" configuration distinguishes itself from conventional backpack-style hydration carriers through its innovative design, purpose-built to integrate seamlessly with modular combat gear and tactical loadouts.

Designed with operational efficiency in mind, this hydration pouch delivers reliable fluid capacity without compromising mobility or gear accessibility. The side-mounted positioning allows soldiers to maintain optimal weight distribution across their combat ensemble whilst keeping hydration within immediate reach during extended missions.

The robust construction and secure zip closure ensure contents remain protected in demanding field conditions, whilst the streamlined profile prevents interference with other equipment or movement.

Whether deployed in training exercises or active operations, this military-grade hydration solution provides the dependable performance and tactical compatibility that professional soldiers demand. Built to withstand rigorous use and integrate flawlessly with FELIN system components, it's an essential addition to any serious tactical operator's kit.

Specifications

Exterior Dimensions

    Height: 41 cm to 42 cm

    Width: 22 cm to 24 cm

    Depth (Unfilled): Approximately 3 cm to 4 cm (expands significantly when the 3L bladder is full)

    Weight: Approximately 180g to 190g (empty)

Key Structural Details

Form Factor: It is a tall, slender "vertical" pouch. This 3L hydration ZipPouch is shaped is specifically designed to mirror the height of the side zippers on the Virtus 40L Daysack and 90L Bergen.

Internal Capacity: It is precision-sized to hold a 3-liter (100 oz) hydration reservoir. It specifically accommodates the "Widepac" style bladders (like the Source WXP) which are wider at the top than standard screw-cap bladders.

Expansion: When full, the pouch takes on a cylindrical profile, typically reaching a depth of about 8–10 cm at its thickest point.

Why the Dimensions Matter

The 41 cm height is critical because it allows the pouch to zip directly to the main chassis of the Virtus rucksacks. If it were any shorter or taller, the zipper tracks would not align. It can also be mounted via MOLLE, where it occupies roughly 4 columns and 6–7 rows of webbing.

The internal hydration reservoir specifically designed for the NSN 8465-31-016-0669 pouch is the Source WXP 3L. Because the pouch is quite slender, the bladder's dimensions change significantly depending on whether it is empty and flat or full and pressurized.
Bladder Dimensions (Source WXP 3L)
State                Height             Width                   Depth (Thickness)
Empty/Flat      43 cm (17 in)    20.5 cm (8 in)       1 cm
Full (3 Liters)   41 cm (16 in)    15 cm (6 in)          9.5 cm (3.7 in)
Critical Fit Details

If you are looking for a replacement bladder or checking a third-party brand, keep these three factors in mind:

    The "Widepac" Slider: The top of the Source bladder uses a horizontal sliding closure. The Virtus/French pouch is designed with enough "headroom" (the 41–43 cm height) to accommodate this rigid plastic slider. A shorter, rounder bladder (like some CamelBak models) might sit too low, making the drinking tube exit awkward.

    Dual-Fill System: This specific bladder usually has both a top slide opening and a circular screw cap. The pouch has a corresponding flap or zipper position that allows you to refill via the screw cap without removing the bladder from the pouch.

    The Baffle Wall: The WXP 3L often features an internal "baffle" (a center weld). This prevents the bladder from "ballooning" into a cylinder shape, keeping it flatter so it doesn't create a massive bulge on the side of your pack.

Technical Description

This item is a low-profile, vertical pouch designed to hold a 3-liter (100 oz) hydration bladder. It is most commonly seen in the **CCE (Camouflage Centre Europe)** pattern.

1. The "ZipPouch" Interface

The defining feature of this NSN is its attachment method. While it has standard MOLLE/PALS webbing, its primary function is to **zip directly onto the sides** of the French issue 45L or 70L "Musette" (Rucksack).

Expansion: It acts as a modular side pocket.
Versatility: By zipping one onto each side of a pack, a soldier can carry 6L of water externally, keeping the main compartment free for other gear.

2. Physical Construction

Material: High-denitier Cordura nylon (usually 1000D) with IR-reflective treatment to meet military specifications.

Closure: A heavy-duty vertical or curved zipper allows for quick access to the internal bladder.

Ports: Features reinforced exit ports at the top for the drinking tube to be routed to either the left or right shoulder.

Drainage: A metal or plastic grommet at the bottom ensures that any condensation or leaks drain out immediately.

Usage in the Field

This pouch is a core component of the French **Gilet de Combat de l'Infanterie**. Because of its zippered interface, it is much more stable than traditional MOLLE pouches, which can "flop" when filled with 3kg of water. It is rugged, salt-water resistant, and designed for high-intensity temperate environments.