Super Large Capacity: The size of this thermal bag is 17.3 x 7 x 11.8 inches (44 x 18 x 30cm) The lightweight design of the backpack also makes it easier for you to go out Comfortable decompression: The backpack’s shoulder straps are thickened with breathable mesh, which makes it easy to carry and relieve fatigue. The three-layer structure can ensure breathability and at the same time play a slow-release and decompression and shock-absorbing effect.