Ultraflask Speed 500ml

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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 dr ink 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 (9.4x2.2in). 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. Show more