This was posted in a different forum, where people were not really able to help out. I asked the original poster, and he said he'd be fine with me asking elsewhere.

Weighted blanket worked so well the therapist suggested a compression
shirt to quell some of the anxiety due to too many sensory signals. The
compression seems to work very well, but the seams on the inside of this
shirt make it unusable for me. Very scratchy and uncomfortable for
someone with tactile sensory problems. Has anyone else tried something
similar or know a brand of compression shirt that is soft and
sensory-friendly on the inside? Mine is “under armor” and it’s
unbearable.