Which backpack?

Morning guys, I'm set to start commuting a couple of times a week again. I've just bought myself a new cx bike for commuting but I need a new bag. The biggest issue I had when I used to commute was a really sweaty back.
Criteria:
Enough space for change of clothes, lunch box & maybe shoes
Doesn't need to be hydration pack
Ventilated back
Thanks guys
Criteria:
Enough space for change of clothes, lunch box & maybe shoes
Doesn't need to be hydration pack
Ventilated back
Thanks guys
0
Posts
http://www.chainreactioncycles.com/osprey-escapist-32-backpack/rp-prod132326
the extra pockets fit, phone, keys and work pass as well which helps as they are easily accessible
Willier GTR 2014
http://www.wiggle.co.uk/deuter-race-exp-air-rucksack/
Voodoo Bizango - 2014 - Dead - Hit by a car
Vitus Sentier VRS - 2017
Brilliant bag and highly recommend but maybe a squeeze for a full change of clothes, shoes and lunch.