The Hydration Backpack is designed for outdoor enthusiasts seeking large capacity and lightweight bag. Ideal for hiking, biking, running, or camping, this versatile day bag supports various activities like trekking, jogging, and sports. Perfect for festivals, raves, and mountain adventures. Specification: Name: Hydration Backpack, Material: Polyester, Product size: about 36x20x2cm/14.17x7.87x0.79 inches, Weight: about 250g. Packing List: 1* Hydration Backpack. Note: Due to different lighting and screen settings, the item color may be slightly different from the picture. Due to different manual measurements, please allow a 1-2cm difference in size. Reliable All-Weather Design: Built using waterproof polyester material and reinforced stitching, this hydration backpack provides long-lasting performance with added visibility from reflective strips and a secure whistle attachment over the chest strap for emergencies. Optimized Hydration Support: Featuring an ergonomic back panel and hydration port, paired with padded, breathable straps and a 3-point adjustable harness, to provide balanced weight distribution and reliable comfort over the go. Easy Usage: Multi-layer storage design combines lightweight load distribution, and organized front-side pockets, for improved efficiency in item arrangement, and access. Ideal for Daily Commute: Crafted to support an active lifestyle, this hydration backpack is lightweight, functional, and adaptable for hiking, cycling, or any other activity requiring reliable gear. Delicate Present: Present this hydration backpack to friends and family, offering both practicality and thoughtfulness to ensure comfort over their outdoor journeys.