This hydration backpack combines a leak-proof, BPA-free 3-liter water bladder with a waterproof backpack made of durable nylon with reinforced seams. Adjustable shoulder straps, a chest buckle, and a ventilated mesh lining ensure a comfortable fit, even during long outdoor activities. The material is waterproof and can withstand wet conditions as well as daily wear and tear. The adjustable carrying system allows the shoulder straps and chest buckle to be adapted to different body shapes, while the ventilated mesh lining distributes pressure. Thanks to its lightweight design, the backpack remains comfortable even during full-day activities. The integrated hydration system provides greater freedom of movement by enabling hands-free drinking. The water bladder's drinking tube is positioned on the shoulder strap, making it possible to drink without removing the backpack. Suitable for hiking, camping, cycling, running, hunting, military training, and emergencies. The water bladder has a capacity of 3 liters and the backpack measures 18×48×2 cm. Precautions: rinse the inside of the water bladder with clean water before first use and allow it to air dry before placing it in the backpack. Do not pour hot water, carbonated drinks, or sugary liquids into the water bladder, as this can cause damage or promote bacterial growth. Empty the water bladder after use and allow it to dry completely; the backpack can be wiped clean with a damp cloth – do not machine wash. Keep out of reach of children. Important notes: dimensions are taken manually and may vary by 1–3 cm; colors may vary slightly due to lighting conditions.