2(X)IST2(X) IST Men's Essential Cotton Contour Pouch Brief 3-Pack

Is this their original brief number 97404?

Is the seat material double layered?

Are the leg holes big enough if you have big thighs, or do you constantly feel them throughout the day?

The xl's say they are for waist 37-39. i have a 40" waist ( on a good day.) most xl's are 40-42" think they might be too tight?