Inner hydration and water pack storage bag for Yamatomichi MINI

This is an inner hydration and water pack storage bag for the Yamatomichi MINI. Size: Height 35cm, Width 24cm. The width cannot be expanded further due to the backpack's design. The height can be shortened. The bag hangs from a hook inside the backpack. The hydration unit is placed inside, and there is a slit on the side of the MINI's shoulder strap to route the tube. This is how the tube is accessed. The bag's fabric is double-layered with a cooling aluminum sheet sewn in between. This also prevents the bag from sinking to the bottom of the backpack. Although it's described as a hydration bag, it's designed to also hold a water bag. This bag allows you to place heavier items closer to your back, making it feel lighter. Thank you for your consideration.