There are several things to consider when choosing the right backpack, starting with your trip length. Will it be a day-long excursion, weekend backpacking trip, or a multi-week adventure? This question will help determine how much gear you’ll need to carry. If your trip is short and your gear is minimal, a smaller pack may work. If you’re going on a longer trek and want to bring more gear, bulkier and heavier items, or need a dedicated compartment for a sleeping bag, you should opt for a larger pack as this will require additional space. Next, think about the season and the weather conditions. In the summer, or in warmer climates, you can pack less, while fall and winter trips will call for extra layers and additional gear. Finally, consider your packing style. If you’re comfortable with fewer items, a smaller pack is ideal. If you prefer bringing extra comforts from home and don’t mind the added weight, go for the larger pack. For more detailed recommendations, check out our buying guide.