Why is it that you can't put every clothes in a drier?

Question

They say you can't put jeans in a drier but nothing happen i know if you put a sweater in a drier it shrinks but some t-shirt our blouses you can't put it in a drier why is that? You have that ticket on your clothes in what temperature you can wash your clothes if it can in a drier ect...

Answer 1

your clothes might shrink or change colour

Answer 2

some factors on recommended washing instructions are based on the fabric, the dye, and whether or not there are any little decorative  buttons or trinkets sewed on the clothes.  

Answer 3

Different fabrics/materials respond differently to heat. Ultimately every natural fiber does shrink a little with heat so even your jeans should feel a little more snug after they come out, but the cotton's sturdy enough so it doesn't matter. On more delicate items or wools they can get trashed.