Collar – but no tie How to look stylishly casual at the office The summer business dress code can often become a heated topic of discussion. Can you discard the jacket when it gets too warm? And what is acceptable wear for casual Fridays? Do you want to take the opportunity to dress down – and escape the pitying glances your colleagues give to their suited co-workers? If so, you have a number of options. Here we've chosen two for you.