We’ve seen how to prepare a backpack for ski mountaineering, with all the essentials that you can’t do without on an outing, starting with the basic safety equipment (avalanche transceiver, shovel, and probe).
Without forgetting, obviously, base layers and outer layers, to make sure you stay dry and so you can change in case of unexpected events.
Also food and water, to keep yourself hydrated and to be able to refuel after the effort of climbing and descending.
Then sunglasses and sunscreen and, depending on the technical characteristics of the chosen route, crampons and an ice axe. All this while remembering to leave a small amount of empty space for storing items of clothing that you start the day wearing. Because climbing warms you up, and quickly.