DIY: A tarpaulin leather

Everybody knows the bags from Freitag and Ortlieb, which are made out of used truck tarpaulins. This material is robust, tough and water-repellent.
I didn't have an old truck tarpaulin, but I have got a tarpaulin from a broken AS-MOTOR 21-165/3 lawn mower.

I've used this material for a new leather for my Praktica LTL3.