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The XMiles Endurance Fuelled Soft Flask 250ml is a versatile and lightweight hydration solution built for performance. With its compact size and collapsible design, this flask is ideal for runners, cyclists, and endurance athletes who need quick access to hydration or energy on the move.
About Endurance Fuelled Soft Flask 250ml
Made from durable, high-quality TPU with a soft silicone bite valve, the flask offers a smooth and mess-free drinking experience. The high-flow valve auto-seals after each sip, ensuring no leakage and effortless use during intense sessions. Its ergonomic form comfortably conforms to your pocket or hand, making it practical for both race day and training.
Not just for water, the 250ml flask is perfectly sized for carrying your own nutrition mix, electrolytes, or energy gels mixed with water. This makes it a cleaner, simpler, and more sustainable alternative to traditional gel packets, no tearing, no stickiness, and no waste mid-run.
Designed with safety in mind, it’s BPA and PVC free, and its durable construction means it can handle whatever your training throws at it. Whether you're racing through trails or preparing for marathon day, this flask is the compact companion that keeps pace with your goals.
How does it work
The XMiles Soft Flask 250ml uses a collapsible TPU body that shrinks as you drink, eliminating bounce and reducing leftover air. The soft silicone bite valve offers a high-flow rate with an automatic seal to prevent leakage. Its 26mm opening is wide enough for easy filling with gels or fluids and simplifies cleaning post-session.
The flask’s design allows it to fit snugly in most hydration vest pockets, handheld carriers, or waistband loops. It’s perfect for athletes looking for convenience without compromising fuelling strategy. By replacing multiple gel packets, it simplifies your carry and reduces mid-run litter.
Tried and tested
Real feedback from the XMiles community.


