Kids' flannel pajama set in black Stewart tartan

I bought these in black watch tartan for my son. They looked fantastic when new, but having been washed and worn some, they look and feel TERRIBLE. Genuinely terrible. I may throw them out because it is that bad. Pilled and rough. I can't say enough bad about it. The polyester fabric is a disaster.

when i ordered these the description said 100% cotton. these are 100% polyester, not as described. they have since updated the fabric content but by the reviews you can tell the description previously said, cotton...

These pajamas are NOT COTTON, and ARE FLAME RESISTANT. The description says, "cotton, not flame resistant". Totally false and super disappointing! Definitely returning these!