Osprey is a big hitter among the backpacking and camping set, and this Manta 20 daypack is like the Ferrari of running backpacks with the comfort of a Cadillac. You’ll have to be economical when packing for work with this small bag, but with four separate pockets to house all your daily needs, you’ll have more than enough room. (Leave the iPad at the office, though.) The waist belt has easily accessible pockets (phone, sunglasses, energy gels) and there’s a clip on the back for a light, if you’re running home at night. What puts the Manta at the top of its class is a 3-liter water reservoir to keep you hydrated.