Osprey΄s new Hydraulics™ 250ml Soft Flasks are an ideal solution for keeping hydrated whilst out and about. Exceptionally lightweight, they pack down to almost nothing when empty and fit comfortably inside your pack΄s stretch mesh pockets. The combined sports cap is ideal for fast handheld hydration, whereas the included extension hose is ideal for those using the flasks in your pack΄s harness pocket. Hydraulics™ 250ml is also the perfect partner for the Duro running range, allowing easy hydration during high-intensity activities.