Oo, I know this one. H (American) wears a t-shirt under his work shirt to mop up the sweat. So he doesn't get sweat marks in the hot climate.

The Marks and Spencer "vest"? We call that a "wife beater", because the people who wear them...

So if that is a vest, what is this in England-speak?
https://thenorthface.com.au/product/men-s-canyonwall-vest-2

H 37 Me 36
Together 15 years
Married 5 years
No kids
BD Apr 2014
H moved out 2 Jun 2014