The North Face Toddler Base Layer / Thermal Long Underwear. Good used condition. There is wear in the knees, but it doesn’t go through the top layer of the pants, as the inside out picture shows. There are a couple of bluish stains on the pants. I didn’t find any noticeable wear on the shirt. I would call this more than mid-weight closer to heavy weight, it’s not fleece but not as thin as a typical merino wool set. 76% Polyester & 24% Merino Wool Comes from a pet friendly home / smoke free