The explanation is provided by Dresden City Management:


Student Welcome Package


Welcome to our city - the first semester students of Dresden's universities! Since 2007, City Management Dresden e.V. has been welcoming new students at the start of the winter semester with a 'Student Welcome Package'.
The centrepiece of the welcome gift is a truck tarpaulin bag, which is produced in a limited edition and artistically designed every year. These bags have achieved cult status and are sought-after collectors' items. The bag contains useful products for everyday student life as well as a wealth of information.
The entire project is only possible thanks to the support of numerous sponsors. City Management Dresden e.V. would like to thank everyone who has actively contributed to its success!