Not only functional, this backpack is stylish and fits everything you need in one place. It's a win-win!Experience the Womens Pinnacle 12 Liter Hydration Race Vest by Nathan Sports, designed in Vapor Grey/Caribbean Blue for a seamless running experience. Weighing just 12.5oz with the bladder or 6.5oz without, this vest is 20% lighter than other Nathan options and specifically crafted for women with a shorter torso and hourglass shape. It features an apparel-like fit with an extended back for comfort, along with contoured chimney back panel construction for maximum airflow. The vest includes multiple pocket designs, such as kangaroo and water-resistant pockets, and an insulated hourglass bladder holding 1.6 liters, complemented by adjustable sternum straps and reflective details for enhanced visibility.