Inderamens Long Drawers - Heavyweight Thermals Thermal Underwear Pant

What is waist size mens large?

Is this particular thermal pant's measure from waistband to crotch overly long, like so many of Indera thermal pants? What is size M's measure?

Why does is 100% cotton advertised here, but product delivered to me is 50% Polyester?

Where are the long johns made? Thank you.