There are many factors to consider when choosing a duffle bag for your tools. First, consider the size of the bag. You'll need to ensure that it's large enough to accommodate all your tools. Second, think about the material the bag is made from. You'll want something durable that can withstand being thrown around or dragged across rough surfaces. Third, consider the straps and handles. You'll want a bag that is easy to carry, even when it's full of heavy tools. Finally, consider any additional features you might wish, such as pockets or compartments for smaller items. With so many options, you're sure to find the perfect duffle bag for your needs.