I love these things!  Grey Cotton-Poly so they dry a little faster when hand washed. They won't yellow! I get them in 3X for a roomy fit over my shirt. I use them as a sweater. They are cheap, durable and reliable. They are warm when layered. All good no bad. Ideal travel clothes. At $10.50 each they are expendable. If something bad happens you are not out a lot of money. Travel is fairly hard work. They can take the abuse. They look good enough under a Blazer too!