Start by packing the Aer Sternum Strap 20 mm around the items you reach for most often. Attach it only to the matching strap points or webbing size, then test the fit with light weight before carrying the bag outside.
Do a quick test pack before relying on it for work, travel, or a gym day. Carry it around the room, open the main compartments, and check whether your phone, wallet, keys, charger, and other essentials are easy to reach. If something feels awkward during the test, move it before your first full day out.
