【Comfortable & Adjustable】 The adjustable straps on the chest bag guarantee that it fits you perfectly. The customizable fit ensures that the bag remains secure and minimizes unnecessary movement, especially during rigorous activity. The wide mesh shoulder pad helps to reduce the burden of your shoulder. This hydration vest backpack is made of lightweight material, ensuring that the added weight does not hinder your performance. The design emphasizes comfort and is suitable for prolonged wear. 【Designed For Endurance】Criuage Hydration Vest Backpack is meticulously engineered for those who participate in endurance activities. It ensures that you stay hydrated throughout your outdoor or sport events. This waterproof running vest can accompany your Running, Jogging, Marathon, Climbing, Hiking, Cycling, Biking, Walking, Backpacking, Traveling, etc. 【Water Bladder System】Hydration chest bag Equipped with a dedicated 2.0L water bladder, the high quality hydration bladder is made of PEVA material and it is BPA-free. The hydration bladder guarantees that you have a constant supply of water on your journeys. The ergonomic design ensures easy sips, keeping your thirst quenched on the go.