The actual product is slightly smaller than expected I think overnight backpacking is possible in the summer. Hello, this is GVG STORE. Thank you for your valuable review. :) I check the size and capacity of the backpack first, and I think the fact that overnight packing in the summer is possible will be of great help to others. Thank you. We ask for your continued interest and support for our GVG STORE, and thank you very much for your order. :)