Received this offer via email.
There is no minimum spend or change given, and one voucher per transaction. Basically you could get a free pair for socks, or a belt for cheap.
I've got a $50 birthday voucher to use, so this is a bonus :)
Anyway, hopefully someone finds it useful if they are going to Chermside tonight or this weekend.
When I bought clothes their the lady handed me a belt and it was $50.