UltrAspire 500ml Softflask

The UltrAspire collapsible SoftFlask carries 500ml of fluid. The unique wedge shape allows it to slide easily in and out of a hydration pocket of any modern hydration pack. Comes with a regular diameter 28mm top that features a silicone sheath bite valve.

• Soft material conforms to your hand to provide a comfortable carrying experience
• Flexible design shrinks as you drink, reducing water movement on the run
• High-flow bite valve auto-seals after each sip and includes a twist locking cap for added security
• 28mm opening makes it a low-profile storage option
• Wide working temperature range (can be frozen - max temp 60° C)