[Ergonomic and Comfortable Design]: The breathable backpack and suspension system are designed in accordance with the body's back movement structure, which is comfortable and breathable to adapt to human muscles. It scientifically distributes the weight of the backpack evenly across the entire backpack and effectively relieves muscle pain problems caused by long-term weight. .[Water Bag]: Our hiking backpack comes with a 2-liter water bag. The water temperature is -20~+50℃ and easy to clean. The water line (40'' long, 1cm in diameter) ensures y water flow and is easy to drink. .[Perfect Capacity]: The storage space of our backpack is 25 liters. This capacity not only helps you store your essential items for traveling or climbing. And you won't be tired of being overweight. It keeps you focused on the journey. Sincere care, soft curves and stylish appearance will make you stick around. .[High-quality Case]: The waterproof case is made of high-quality nylon material with waterproof outer coating and PU coating on the inner layer. It can provide reliable rain protection up to 3000mm, very suitable for all kinds of rain activities. .[Reliable and Friendly Customer Service]: The mountain backpack is specially designed for outdoor mountaineering enthusiasts. We a 30-day money-back guarantee and a 3-month replacement guarantee. If you are not satisfied with our hiking backpacks for any reason, please us. We will be happy to help you.