Hydrapak Ultraflask Speed 500ml is an ultralight soft flask optimized for trail running vests, packs, and belts, featuring a wide stable base and pliable TPU that shrinks as you drink for bounce-free hydration. This 42g flask with SpeedFill cap and self-sealing bite valve enables quick refills with ice or mixes at aid stations, ideal for ultras or fast hikes.
Key Features
- Ultra-Durable TPU Build: Abrasion-resistant RF-welded seams with 3D-welded bottom; weighs 42g/1.4oz (9.4×2.2in).
- SpeedFill Flip Cap: 42mm wide opening flips open for fast ice/drink mix refills; snaps shut leakproof.
- Self-Sealing Bite Valve: High-flow silicone auto-seals after sips to eliminate drips; hands-free sipping.
- Vest/Pack Compatible: Soft, conforming material fits snugly in pockets; collapses empty for minimal bulk.
- Extreme Versatility: Freeze-safe (-20°C to 60°C/140°F); pairs with 42mm filters; BPA/PVC-free.
