Hi, I own an upholstery shop.  
I do as well, In fact the word "upholstery" comes from the English word "upholder",Which is used because tradesman who held up his goods.
There are so many uses for upholstery.
yes and most materials like coil springs, animal hair, coir, straw and hay, hessians, linen is all done by hand. Nowadays we do it by machine.