Hiking Optimized Design: This hiking hydration backpack with bladder is purpose built for hiking outdoor adventures, featuring a dedicated compartment to securely hold the included 2L water bladder. The leak-proof and taste-free water bladder ensures a clean and pure drinking experience, while keeping your gear dry and protected. Lightweight Performance: Designed with lightweight and waterproof Nylon materials, this lightweight insulated hydration backpack minimizes the weight burden on your shoulders, allowing for comfortable and unhindered hiking and running. You can move freely and effortlessly, focusing on the beauty of the trail without feeling weighed down by a heavy pack. Advanced Insulated Hydration Backpack: Miracol specialized insulated hydration pack equipped with cutting-edge insulation technology that preserves the coolness of your water for 4 hours, regardless of external temperatures, this ensures that you can stay hydrated and refreshed throughout your hike, even in hot weather conditions.

Military Tactical backpack size approx.:13"*20"*11" / 33*50.5*28CM (W*H*D),Capacity: 40L; Military backpack is made of high density fabric--durable and water-resistant Molle tactical backpack has molle system, Molle webbing throughout for attaching additional tactical pouches or gear as 3 day assault pack backpack combat molle backpack. Assault pack backpack with double-stitched, Heavy duty zippers and utility-style cord pulls, Side and front load compression system, Ventilated mesh padded back area & shoulder strap,breathable and comfortable.