Streamlined Hydration for Fast-Paced Adventures

The HydraPak UltraFlask Speed 500ml is specifically engineered for endurance athletes and trail runners who prioritize weight, efficiency, and ease of use. This flexible soft flask is designed to fit comfortably in most hydration vest pockets, shrinking as you drink to minimize water slosh and save precious pack space. Whether you are racing a technical ultra-marathon or embarking on a fast-and-light peak bag, the UltraFlask Speed provides reliable hydration without the bulk of traditional hard bottles.

What sets the "Speed" version apart is its large 42mm opening, allowing for incredibly fast refills at aid stations and easy loading of ice or electrolyte powders. It comes equipped with a high-flow bite valve that seals automatically after every sip, preventing annoying leaks. The flask is made from ultra-durable, abrasion-resistant TPU and RF-welded seams, ensuring it can withstand the rigors of the trail while remaining flexible enough to be stashed away when empty.

Key Features:

• Large 42mm Opening: Enables lightning-fast refills and easy cleaning, perfect for timed races and high-output efforts.
• Collapsible Design: The soft material conforms to your pocket and shrinks as you drink to eliminate sloshing and reduce volume.
• High-Flow Bite Valve: Provides quick hydration on the move and seals automatically to prevent drips between sips.
• Universal Fit: Designed to fit perfectly in a wide variety of hydration vests, belts, and pack pockets from major outdoor brands.
• Durable & Lightweight: Constructed from heavy-duty TPU with RF-welded seams for superior durability and elasticity without the weight.
• BPA & PVC Free: Safe, taste-free material that meets or exceeds all global food safety regulations.
• Easy Maintenance: Top-rack dishwasher safe for effortless cleaning after long, dusty days on the trail.