what is thermal shirts?

Answer 1

They look like old-style long johns (long underwear), made of cotton with a waffle pattern in the weave. Now they come in more colors and styles than just old long underwear came in.

Answer 2

there called long john shirts there heavy shirts that you under you regular shirts to keep you warm in the winter time they also have long john pants also that you wear under your pants.My Husband works in the cold weather outside and they keep him nice and warm I buy his at wal -mart or Jc Penney's.

Answer 3

Yea what she said. Long johns.