The Eos Hydration Evolution: Choosing The Right Hydration System For Every Run
Whether you're training for your first 10km, preparing for a marathon, or tackling technical trails deep in the mountains, one thing remains constant: hydration matters.
As runners, we often spend hours planning our training sessions, choosing the right shoes, and setting race goals. Yet hydration and fuelling are often left as an afterthought until fatigue hits, performance drops, or cramp sets in.
The reality is simple. As your distances increase, your hydration strategy needs to evolve too.
That's why we developed a range of hydration solutions designed to support runners at every stage of their journey. From quick training sessions to ultra-distance adventures, there's a solution built for the demands of the run ahead.
Why Hydration Matters
Even mild dehydration can impact performance, concentration, and recovery.
As you sweat, you lose not only water but also electrolytes that are essential for muscle function and maintaining energy levels. During longer efforts, your body also requires carbohydrates to continue performing efficiently.
The challenge is finding a way to carry what you need without adding unnecessary weight, bulk, or distraction.
That's where the Eos hydration range comes in.
300ml Soft Flask Twin Pack
Lightweight Efficiency. Maximum Speed.
Not every run requires large amounts of water.
For speed sessions, interval training, races, or shorter runs, carrying excess fluid can simply add unnecessary weight. Our 300ml Soft Flask Twin Pack is designed for runners who want to move fast and stay light.
The compact design provides enough hydration for shorter efforts while keeping weight to an absolute minimum.
The twin flask setup also creates an excellent fuelling solution for longer runs. Many runners use one flask for hydration and the other for soluble nutrition such as carbohydrate drink mixes or electrolytes.
When paired with the Eos UltraEndure Vest, the 300ml flasks fit seamlessly into the front mesh pockets, giving you quick access to hydration and fuel without breaking stride.
500ml Soft Flask
The Everyday Essential
Sometimes simplicity is best.
Whether you're heading out for a 5km run, a recovery session, or a Sunday hike, the 500ml Soft Flask offers enough hydration to keep you comfortable without weighing you down.
It can be carried comfortably by hand or stored securely in the rear pocket of the Eos UltraLight Vest.
Every Eos bladder and soft flask features our leak-resistant bite valve system, allowing easy access to hydration while preventing frustrating leaks and spills.
For runners who want a simple, versatile hydration solution, the 500ml flask is often the perfect place to start.
700ml Soft Flask with Hydration Tube
When the Distances Start Growing
As training volume increases, stopping becomes more disruptive.
Long runs, marathon training blocks, and all-day adventures require consistent hydration. The 700ml Soft Flask with Hydration Tube is designed to help you stay on top of your hydration without interrupting your rhythm.
The integrated tube system allows quick access to water while moving, helping you maintain pace and conserve energy.
Compatible with both the Eos UltraLight 2.0 and UltraEndure Vests, it creates a streamlined hydration setup that lets you focus entirely on the miles ahead.
When your runs start getting serious, your hydration strategy should too.
1.5L Hydration Bladder
Built For The Long Haul
Are you part of the marathon one percent?
Or perhaps your adventures take you off-road and into the mountains.
For runners tackling marathon training, ultra-distance events, or challenging trail routes, carrying sufficient hydration becomes critical.
The Eos 1.5L Hydration Bladder is designed to provide reliable access to water throughout your longest training sessions and biggest race-day challenges.
Its wider profile sits comfortably against your back, distributing weight evenly while reducing movement. The integrated tube system allows easy drinking on the move, helping you stay hydrated without breaking your flow.
Most importantly, it reduces the stress of relying on water fountains, aid stations, or refill points by allowing you to carry everything you need from the start.
When the goal is going further, preparation becomes everything.
Hydration That Evolves With You
No two runners are the same.
A 5km runner has different hydration needs to a marathon runner. A road runner has different requirements to an ultra-runner spending hours on technical trails.
That's why we've built a hydration range that grows with your running.
From lightweight 300ml flasks designed for speed, to 1.5L bladders built for all-day adventures, every product is engineered around the same goal: helping you stay hydrated, fuelled, and focused on the run ahead.
Because when your running evolves, your hydration should too.
Explore the Eos Hydration Range and find the setup that matches your next challenge.
