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Hydrapak Ultraflask Speed 600

The Hydrapak Ultraflask Speed 600 is a super lightweight soft flask designed to be used with running packs and vests during missions on the trails and fells.

Go big. The largest of Hydrapak's 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. 


  • BPA & PVC free
  • Leakproof
  • Freezeable
  • COMFORTABLE FIT: Soft material conforms to most hydration vests, belts, or pack pockets
  • COMPRESSIBLE: Flexible design shrinks as you drink reducing water movement
  • CUSTOMIZABLE HYDRATION: Choose between a bite valve and a drink tube cap
  • SPEEDFILL CAP: Topped with a flip top cap for fast refills at aid stations


  • Capacity: 600ml
  • Weight: 46g
  • Dimensions: 186mm x 81 mm / 7.3 x 3.2 in
  • Material: TPU, PP/POM, Silicone

    Personal Shopping - By Appointment

    Would you like to try on some climbing shoes or mountain boots for size before you make your purchase? If so, then why not book an appointment with us today! We can offer you a bespoke one-on-one shopping experience with one of our experienced staff members.