The Dyna 15 hydration bag from Osprey is made for trail runners looking for a high-performance, comfortable and lightweight bag. Its capacity of 15L will allow you to travel long distances without having to leave anything behind. The construction of the bag has been redesigned by Osprey to offer you maximum stability during your runs. The bag will wrap around the upper body for better load distribution and maximum comfort. This hydration bag will not compromise your freedom of movement and will be comfortable to wear.The mesh material makes the bag breathable and durable. Numerous pockets will make it easy to store your things with quick access. You will even have room for a rain jacket or other equipment to accompany you on your adventure. The Dyna 15 is compatible for use with Hydraulics 2.5L water reservoirs (not included). Two 500 ml removable soft flasks are included. Two Stow-on-the-Go loops on the back of each shoulder will allow you to hang your poles when you need your hands free. The adjustable bag settings are practical and removable so that you can easily adapt your bag to your body shape, even during exercise.The Dyna 15 is a bag that will accompany you on medium to long distance trails, it will be your best friend for exploring the mountains in complete freedom.