It's probably the nostalgia for a simpler lifestyle that's bringing backpacks back into fashion, with many designers creating high-end miniature versions vaguely reminiscent of suburban mall life in the late nineties. There are also larger versions, to remind you of your middle-school days. But the main reason we're interested in this trend is because backpacks seem to be an easier option than carrying multiple totes. We're also intrigued by the fact that models invariably seem to be carrying them (always with a strap slung jauntily on one shoulder) into their casting calls. So here we've rounded up our favorite cool backpacks, avoiding ironic hipster prints and focusing on streamlined or unusual shapes in simple, dark colors that work well through the end of summer and into fall. Click on to see our picks.