This collection of bags, called Papier (= paper), was actually designed by Stefan Diez for Saskia Diez, his wife who designs really nice jewelery. They are made from the same material, Tyvek®, as his other bags A1 & A2. It is a synthetic paper made from PE which is extremely tearproof, lightweight, waterproof and recyclable. Like most bags, they become nice after some wear and tear/great material/via: today and tomorrow