If you have the resources, you can check out Lap of Love and see if they serve your area. They come to where you live so your friend can have a peaceful euthanasia with your company. I favored this option because it allowed my other dog to smell my boys body before it was taken to the crematorium. She tends to be dense, but she could immediately tell he was gone. I really think this helped her grieving process compared to him not being around suddenly.
Euthanasia is the hardest, most loving thing we can do for a companion who is nearing their end.
This is all cotton. It's a quilting fabric so it's a little thick for a shirt, but that works fine for men's wear