Can you wash and dry GlitterFlex? Yes, you can!
Once fused, GlitterFlex vinyl launders quite well. Turn the item inside out and wash "cool" per the manufacturer's instructions. Easy-peasy! I have also washed a test sew very successfully without turning inside out; but if you have the option, turning it inside out gives it a little more protection. Tumble dry on low heat or lay flat to dry.
This was my grandson's favorite jacket (from Airplane Adventures) until we had to take it away from him because the sleeves were so short. It went through many washings as you can imagine with a little boy. The GlitterFlex still sparkles today just as it did when I gave it to him. Proof in the puddin' that GlitterFlex handles the wash beautifully!
I think I need to go make a new "favorite jacket" for this little guy.
Hope your day is blessed with perfect stitches and GlitterFlex!