The three-dimensional frame is sewn into the inner part of the backpack, which makes the backpack support the bag body more closely so that the back plate gets stronger support.
EVA, which is close to the back of the human body, fits with the back. At the same time, it makes the back and backpack form relative air circulation through the internal frame.
Ergonomic design fits the curve of the back, transfers the weight of the backpack, improves the comfort of the backpack, and the weight of the backpack light
