Slim and Compact Design: Measuring 19.7x8.7x2.6 inches. Ergonomically contoured for your shoulders, chest, and waist. All 3 straps are adjustable to minimize bounce. Soft air mesh on the back accelerates airflow, keeping your back cool. Foam-padded shoulder straps offer exceptional comfort. Reliable Material: Durable 1000 Denier water-repellent nylon with superior abrasion resistance. Technical plastic buckle is durable and impact-resistant; Military-grade webbing is strong and colorfast. Practical Features: 1 main compartment accommodates up to a 3L water reservoir with either a large or small opening. 2 external pockets for storing personal belongings like wallets, gadgets, towels, phones, and keys. Professional 3L Hydration Bladder: Made from BPA-free, tasteless TPU. Quick-release valve allows for water refilling without disconnecting the hose. Large opening makes cleaning and adding ice cubes easy. 360-degree rotating nozzle enables effortless drinking. Shut-off valve helps regulate water flow. Internal divider keeps the bladder flat, making it easier to place in your backpack. Versatility: Frees your hands while you drink. This tactical hydration pack is your perfect choice for short trips, camping, cycling, hiking, mountaineering, kayaking, skiing, and snowboarding. A great holiday gift for families and friends who love outdoor activities. Satisfaction: Our customers are our top priority. If you encounter any issues with the product after receiving it, such as damage or incorrect quantity of goods, please contact the seller immediately, and we will do our best to provide you with satisfactory customer service.