[Waterproof] Sidekick 04 Expansion Bag

Carry your extra gear, just as it is.

The Sidekick 04 is a 4-liter expansion bag compatible with Enduristan's unique ESI (Enduristan Standard Interface) system.

By adding 4 liters of storage capacity, it is ideal for situations where you need more room for camping gear, extra layers, or food while on the road.

Expand your capacity only when you need it.

That is the appeal of the Sidekick series.

The capacity you need, right where you need it

It can be quickly attached to any ESI-compatible product, allowing you to expand your storage to suit your travel style.

"I just need a little more space."

When that happens, you can add 4 liters of storage, and simply remove it to return to a streamlined setup when it's not needed.

Practicality, the Enduristan way

Featuring a completely waterproof, dustproof, and mud-proof construction.
You can use it without worrying about rain or mud.

What is ESI (Enduristan Standard Interface)?

ESI is a new expansion system adopted by Enduristan.

By adding compatible expansion bags or bottle holders, you can build a cargo system tailored to your specific needs and travel style.

Place tools where they are easy to reach, or add small items you use frequently within arm's reach.

The beauty of the system is how you can customize and grow your setup over time.

Since it is compatible across various products, you aren't just buying a bag—you are building your own travel system.