Rayon is a fav fiber of mine... and it seems many people don’t know what it is... so I’ll share the cliffs notes (cliff notes? Whatever. You know what I mean)
Rayon is made of wood pulp. Rayon, lyocell, tencel, viscose, and bamboo are are all [close to the same] textile fibers, and differ just in the species of wood pulp, or the brand name.
I love them all - they feel incredible on your skin, drape and move beautifully, and breathe well.
Caring for rayon can be tricky. In short, for best results : wash it in cold water, lay it flat to dry, low heat steam iron as needed.
You want to keep the heat to a minimum for 2 reasons :
1) it shrinks like nuts (I pre-shrink all rayon fabric before sewing with it, but it can continue to shrink with extra heat)
2) repeated application of heat will break down those fibers over time (Think of the fact that it’s wood at its core...)
Basically - rayon (or any of the names it goes by) will last longer if you don’t obsessively wash it, and if you care for it properly.
Now, I’ll tell you the real truth. For my personal wardrobe, I wash rayon on cold, shake it out really well, and machine dry on ultra low. I INTEND to take it out of the dryer after 10 mins and hang it to dry, but often forget 😬 The few mins in the dryer saves me from ironing, and I justify it by not washing these things too often, even tho I know it’s not best!