Osprey Hydraulics Soft Flask - 500 ml

Smooth Performance

Designed specifically for running vests, this 500-ml soft bottle lets you hydrate effortlessly while running without stopping. A removable WingStay™ stabilizing insert prevents the bottle from bouncing, while the wide opening makes it easy to add ice cubes or mix beverages containing electrolytes. The high-flow valve, easy-grip rotary closure, and tapered shape make it easy to drink on the go. Made from durable TPU with HF-welded seams and compatible with the ultraflask filter cap (sold separately).

Features of the Osprey Hydraulics Soft Flask:

• Removable WingStay stabilizer insert to prevent jostling 
• 42 mm wide opening for quickly adding ice cubes and drink mixes 
• Tapered shape for easy storage 
• Self-closing bite valve with high flow rate 
• Durable TPU and HF-welded seams 
• Non-slip rotary closure