What is the HydraPak SoftFlask Speed 500ml?
The SoftFlask Speed is built for runners and fast-moving athletes who need hydration that keeps pace. Its low-profile, tapered shape slides smoothly into vest and belt pockets without bulk or bounce, while the flexible soft-flask design compresses as you drink, reducing sloshing and improving carry comfort.
What is it made of?
Durable TPU Body
The main body of the SoftFlask Speed is made from lightweight yet highly resilient TPU, a flexible material known for its durability and resistance to abrasion. This allows the flask to compress naturally as you drink, reducing slosh and saving pocket space while maintaining its shape and reliability over time. Unlike rigid bottles, TPU won't crack in cold conditions or deform under pressure, making it ideal for repeated folding, squeezing, and stowing during training and race use.
Secure Component Construction
Key connection points — including the cap structure and internal mechanisms — are made from PP (polypropylene) and POM (polyoxymethylene). These engineered plastics provide precise stiffness and dimensional stability, ensuring the cap seals tightly and opens smoothly, even after months of use.
High-Flow Silicone Valve
The soft silicone bite valve creates a smooth, natural sipping experience without requiring excessive pressure or squeezing. Its self-sealing design closes instantly after each sip to eliminate drips and keep gear dry. This is especially useful during high-intensity movement where maintaining rhythm and efficiency is key — simply grab, bite, drink, and continue without breaking stride.
Stainless Steel Support (304SS)
The flask incorporates 304-grade stainless steel reinforcement in select stress zones to enhance durability without adding unnecessary weight. This provides subtle structural stability where it's most needed — particularly around high-wear junctions — increasing product lifespan while keeping the flask light, flexible, and race-ready.
Safe, Clean Hydration — Every Time
All materials used in the SoftFlask Speed are BPA- and PVC-free, ensuring that your water tastes clean and fresh with no chemical flavour transfer, even in warm conditions or over long durations. This keeps hydration both safe and pleasant — something endurance athletes notice immediately on long days outside.
What are its features?
Made for Fit
The SoftFlask Speed is engineered to work seamlessly with the widest range of running vests, belts, and pack pockets. Its low-profile, tapered shape prevents pressure points and eliminates the awkward bulging common with rigid bottles. The pinch-welded base helps the flask slide smoothly into narrow pockets and stay anchored once in place, even during fast descents and high-tempo movement. The result is hydration that feels secure, stable, and barely noticeable — exactly what you want on technical trails or race day.
High-Flow Bite Valve
The self-sealing silicone bite valve delivers water the moment you want it, no hard squeezing or lid-fumbling required. It provides a steady, effortless flow, allowing you to hydrate while maintaining cadence, breathing rhythm, and focus. Once released, the valve automatically seals shut, preventing leaks inside pockets and vests — ideal for long runs where efficiency and cleanliness matter.
SpeedFill Cap
The SpeedFill flip-top cap provides quick, one-handed use, making refills at streams, taps, or aid stations fast and stress-free. Flip open to fill — snap shut for a secure, leakproof seal. This cap saves precious seconds in race environments and keeps transitions smooth on training days. When combined with the compressible body, refilling becomes a simple, fluid motion rather than a chore.
Wide Opening
The 42mm opening is generously sized to accommodate water, energy drink mixes, and even ice, helping you manage hydration and cooling strategies more effectively. This wide-mouth access also makes the flask easier to clean, reducing buildup of sticky drink residues over time — a big benefit for runners who use electrolyte or gel mixes on long outings.
Compressible Design
As you drink, the SoftFlask Speed naturally collapses in volume, reducing weight and sloshing while maintaining steady and balanced hydration. This adaptive shrink reduces unnecessary movement inside your pack or pocket and frees up space for gels, gloves, or layers as the run continues. When empty, it packs down nearly flat — ideal for ultralight travel or compact vest setups.
Features:
- Low-profile tapered shape fits securely into vest, pack, and belt pockets
- Self-sealing high-flow silicone bite valve prevents drips
- SpeedFill flip-top cap allows fast, one-handed refills
- Wide 42mm opening accommodates ice and drink mixes
- Compressible soft-flask design shrinks as you drink to minimise sloshing
- BPA- and PVC-free materials for clean-tasting hydration
- Pinch-welded base for secure pocket retention
- Lightweight construction ideal for racing and training