UltraFlask™ Speed 600 ML Soft Flask

The UltraFlask Speed 600 ml holds more so you can go run the distance. Its soft material shrinks as you drink to minimize water movement.
Go big. The largest of our ultra-light series, the UltraFlask Speed 600 ml holds more so you can go the distance. Its soft material allows it to fit snugly in most vest pockets and it shrinks as you drink to minimize water movement. Topped with our newest SpeedFill™ cap feature that makes aid station refills a breeze. 
Replacing your bite valve from time to time helps maintain your hydration system. HydraPak's Bite Valve Sheaths provide a soft bite and are made of durable silicone. Perfect for chewers or to keep in your emergency gear kit with your bandaids and duct tape. Fits and replaces all HydraPak bite valves on our Reservoirs, SoftFlasks, and UltraFlasks.  *Please note - Blaster Sheaths DO NOT fit on the new Comet Bite valves and are not compatible with any of the new 2023 reservoirs. Please purchase Comet Bite Valve Sheaths HERE.
When it comes to hydrating equipment, heavy duty use needs heavy duty cleaning. Bottle Bright tablets are readily biodegradable, safe & environmentally friendly, made to keep all your containers clean and operating at optimum performance. Contains 12 tablets. Use one tablet per liter of water. 

UltraFlask 600ml (WITH OR WITHOUT TUBE) Highly Compressible Soft

HydraPak Ultraflask Speed 600ml Blue Water Bottle Soft Flask

Black Diamond 500 ml Soft Flask — SkiUphill

HydraPak SkyFlask IT Speed 500ml - Insulated

Hydrapak Hydrapak Ultraflask Speed - Lantau Base Camp

HydraPak Ultraflask Speed 600ml - Soft Flask – Capra Running Co.

HydraPak UltraFlask Speed 600ml 2-Pack - Collapsible Soft Flask

UltraFlask Speed 600ml — TC Running Co

HydraPak UltraFlask Speed 600 Water Bottle

HydraPak Flux™ Ultra-light Flexible Bottle

HydraPak UltraFlask IT 500ML Vest Compatible Water Bottle

UltrFlask™ WMX 500ml Soft Flask