Usually when we think of paper bags, durability isn’t the first feature that comes to mind. But SIWA , a veteran paper manufacturer, has produced a unique paper material that can carry up to a 10 kg load. “SIWA / sum paper” is tear resistant and purposely wrinkled to create a distinctive, slightly venerable texture. This is balanced nicely with the modern designs and colors of the bags. Products also include book covers and envelopes, all of which are gentle to the touch. Prices range from 15 to 30 US dollars.