My understanding that was for the special fabrics and/or the dyes used. For example raw indigo bleeds a whole lot more with higher heat. I know there are some f

My understanding that was for the special fabrics and/or the dyes used. For example raw indigo bleeds a whole lot more with higher heat. I know there are some fabrics and blends that are fragile compared to something like a cotton tshirt and recommend colder water.