<b>Dtown Compact Hydration Pack with 2L Water Bladder</b><br><br>The most important thing you need to carry when heading out for a full day of adventure is water. When you are thirsty and when you need water, this hydration backpack has you covered enough water for hours for running, riding, hiking or cycling. <br><br>Designed for your comfort in mind, the water backpack can be fully adjusted in the shoulder, chest, and waist, through 2 adjustable belts. Both shoulder and chest straps make the backpack perfectly fit your body and ergonomic. Breathable mesh pads on the back to enhance comfort to the fullest. They help to keep the pack from moving while jogging, cycling, hiking or other activities. <br><br>Multi-purpose Insulation Compartment Keep liquid cool for up to 4 hours. Multi-function and lots of pockets perfect for your sports needs for storage of lunch box, fruits, snacks in daily use and outdoor necessity.<br><br>The reflective strips in the back and on the shoulder straps and the whistle on the chest strap increase night-time visibility and better safety. The design of the reflective strips on the front and rear and the whistle on the chest strap take full consideration of the safety of night riding, running and hiking, providing a safe and reliable user experience for outdoor enthusiasts.<br><br>The mouth of the bladder is a large 3.1-inch (8 cm) opening which makes for easy pouring of water and putting ice inside. At the same time, the large opening design can also be used to make cleaning by using warm water to rinse out the bladder.