This no fuss backpack is made from a JetSki billboard, seatbelts that have failed WOFs and remnant lining and shoulder straps from a damaged backpack ( straps still great condition)
It has a zipper at the top and an adjustable closing belt so that you can put a different range of sized objects in it. 
If it rains just roll up the top like a dry bag and secure with belt clip. 
It’s no fuss, basic lining, no pockets easy to use and being billboard tough and lightweight 
Measurements are approximately 58cm L ( from zip to base) x 40cm W x 12 cm D
As per usual totally unique 😉