"This hydration vest makes every second count. The Nathan VaporAiress Lite 4L with 1.5L Bladder for women ensures you have plenty of hydration storage to tackle short road runs and longer trail marathons. ""Set it and perfect it"" adjustable fit system hugs the vest to your body for a secure journey while staying breathable and chafe-free. A magnetic hose clip makes sipping from your 1.5L bladder a mindless task so you can focus on your goal."