Take note, backpacks are back! New features and functions are making them the new grab-and-go fashion accessory (sorry, messenger bags). Brands like Herschel Supply Co., Stone + Cloth and Fjallraven place an emphasis on utilitarian details, durability and a timeless aesthetic. Because of these fashion-friendly characteristics, all have been picked up by major retailers from Madewell to Nordstrom to Urban Outfitters. Whether you're headed back to school or not, make the grade with these updated fashion essentials.