Danish paper cord is the material used to weave a typical seat found in many Danish chair designs. It is a very strong 3-ply paper product. It gained popularity starting back after World War II in Denmark and other European countries. It struck the right balance of ease of production and availability combined with its durability. Because of shortages of supplies after the war the same paper product was used to make tires even. For seating it is estimated to last up to 60 years with normal use.
It is a perfect sustainable choice for seating material. The material cost is reasonable versus what it gives back. It is also an eco friendly paper product since it is unbleached. The only drawback to manufactures is that it takes specially trained labor to weave the seating and it takes several hours to accomplish on a typical chair. This explains why you generally only see it on high end quality made furnishings.
So you might just consider choosing Danish cord for your next chair.