Very nice pajamas.
They are comfortable with a very good fit.
In terms of materials, it's like wearing a lighter sweatshirt and a lighter pair of sweatpants. It's not as thin as some others that feel like wearing a sleeved tank top.
It will show after a few washes whether the prints will fade. I hope not because MEI generally has quality products.
I will definitely get two or three winters out of them!