Can you wear thermal underwear and sweat out? Garbage!
The landlord can take a down jacket or a thick coat and wear one inside. If it is cold, he can wear a thin cotton dress, a sportswear and a hat outside.
Because training requires sweating, sweating too much is uncomfortable, and sweating out is uncomfortable.
So you can wear sweat and go out. When you practice in winter, you won't feel cold when the heat comes up After practice, the sweat dispersed and it became cold. So teach you to take your coat and put it on immediately after practice!
I am a professional Sanda coach!