If you're ready to trade in your tote for a backpack as the weather warms, you're not alone. We love backpacks because they keep our hands free, they evenly distribute the weight of our crap across our bodies, and they're just so convenient. At the same time, we don't need to look entirely like we're on our way to 5th grade science lab. We recently noticed a backpack surge in spring and summer bag offerings from some of our favorite fashion sources, and we couldn't be happier. Take a break from answering emails long enough to peek at five new bags that caught our eye. Your purse is going to get very lonely this summer.