To save on the heating bill, I decided to buy this thermal top (oat) and lower the set temperature at my apartment.  So far it works very well.  This is arguably the warmest thermal shirt I've had, dramatically warmer than&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Duofold-Men-s-Midweight-L-S-Crew-With-Moisture-Wicking/dp/B003XRF0DO/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Duofold Men's Midweight L/S Crew With Moisture Wicking</a>.  Washed it, and not much changed was observed.  I'm relatively skinny, 5'7" and 38" chest.  Bought a small one, and fits me well.  I wear it a lot, and it doesn't acquire smell easily.  In fact it has not become smelly so far.  To be fair I don't wear it for excercises.