Here’s a great and welcome muscle undershirt recommendation from a reader who happens to be rather particular:
I’m a guy who is very particular about his undershirts. I like a cotton sleeveless undershirt with a crew neck an no ribs. Gap made them and then stopped. Champion/C9 made them and then stopped.
I finally found something after searching for months and wanted to share. Sears has two new ones (see links). The dockers one fits nice but a little thick (more outer wear), but the structure shirt is perfect! 95% cotton, 5% spandex, the perfect blend, just the right thickness and fit, I grabbed up 6 of them. Hope this can help someone else.
Dockers Prostyle Muscle Shirt ($14.00/each)