Good backpack for commuting?
Looking for a good back pack for commuting duties, currently using a shoulder/messenger style bag which just swings about too much for my liking. All i carry with me is my lunch in a 3.5 liter lunchbox and the usual's of wallet,keys and phone. Also might need space for a rain jacket and maybe my work top when it's too warm to wear it. Also want something with reasonable venting for the back to stop me getting too sweaty. cheers