Ultraspire Softflasks

This collapsible SoftFlask carries 300mL of fluid. The unique shape allows this SoftFlask to slide easily in and out of a hydration pocket. Comes with a larger diameter top to fit ice cubes and keep fluids cool. Features a silicon sheath bite valve.

This collapsible SoftFlask carries 500mL of fluid. The unique shape allows this SoftFlask to slide easily in and out of a hydration pocket. Comes with a larger diameter top to fit ice cubes and keep fluids cool. Perfect to combine with the 300mL SoftFlask to carry more fluid or electrolytes if needed. Features a silicone Sheath Bite Valve.

This collapsible SoftFlask carries 800mL of fluid. The unique shape allows this SoftFlask to slide easily in and out of a hydration pocket. Comes with a larger diameter top to fit ice cubes and keep fluids cool. Features a silicone Sheath Bite Valve.

This collapsible SoftFlask carries 800mL of fluid. The unique shape allows this SoftFlask to slide easily in and out of a hydration pocket. Comes with a larger diameter top to fit ice cubes and keep fluids cool. Features a silicone Sheath Bite Valve on a Locking 42mm cap.

This collapsible SoftFlask, produced by HydraPak™,carries 625 mL of fluid and is engineered for long-distance performance. The updated 28mm locking cap prevents leaks while maintaining a low-profile silhouette that reduces body contact when used in a race vest or waist pack. Its flexible shape allows the SoftFlask to slide easily in and out of waist pack or vest pockets, making it an ideal companion for streamlined, fast-moving setups.

This collapsible SoftFlask, developed by UltrAspire in collaboration with HydraPak, introduces a unique shape and carries 1 liter of fluid that is engineered for long-distance performance. The 42mm locking cap prevents leaks while maintaining a low-profile silhouette that reduces body contact when used. Its flexible shape allows the SoftFlask to slide easily in and out of the side pockets of the Traverse and Purist. This 1-liter SoftFlask is also compatible with the bloddle hose attachment, offering added versatility for different hydration setups.