I have bought these many times and although my husband and son say they are cheap the quality is excellent. The material is not thin, has a decent thickness. While it's not thermals I will say it's better than some thermals I've bought which were so thin I'm not sure if it will keep anyone warm but it will keep them warm and not thermals and that material it is permanent. I've washed them before and they haven't shrunk which is great and they are very soft. The price is great for such a high quality basic shirt.
AM Fitted T Shirt 3 Pack for Men's Clothing - T-Shirts & Tanks
46 Review
Ashers Apparel Schrute Breakfast T Shirt Men's Clothing for T-Shirts & Tanks
34 Review
Next Level Premium Fitted N6210: High-Quality Men's Clothing & Essential T-Shirts + Tanks Collection
39 Review
Hanes Sleeve T Shirt Large White Men's Clothing T-Shirts & Tanks: Premium Comfort and Versatile Style
33 Review