It’s a rock solid, spacious bag, enough to hold (with the right equipment and a very precise vertical sponge modelling), my head, my mini-synth, my multiFX, and there’s still still space for 1-2 small devices. I suggest to accurately plan which squares to take-out and by the way, to start from less to more, according to the piece of equipment shape, as in case of mistake, then the replacement sponges are expensive.