We even used it as one bag traveling because this has the most comfortable straps and hip belt and only weights 3lbs. Size small. It shows use.
https://www.youtube.com/watch?v=QsiCi6pHouQ
It is known as highly durable, top-loading backpack designed specifically for alpine climbing, ice climbing, and ski mountaineering. Known for its burly 210-denier nylon construction, it can comfortably haul heavier loads (up to 35–40 pounds) compared to standard daypacks
Key FeaturesWinter-Specific Carry Options: Features A-frame ski loops, a front panel designed to hold snowshoes or a shovel, and dual ice-tool holsters.Harness-Friendly: The heavily padded EVA foam hip belt includes integrated gear loops and can be removed entirely to accommodate a climbing harness.FlapJacket System: The top lid is fully removable for a sleeker profile and lighter weight, utilizing an integrated FlapJacket to keep the main compartment sealed from the elements.Haul System: Equipped with a three-point haul system, reinforced grab handles, and glove-friendly buckles.Technical Specs (Medium Size)Volume: 37 litersWeight: ~3 lbs 6 oz (varies by size)Frame Material: Aluminum and HDPE framesheet