Originally Posted by Man Of Lint
I wear denim with sport coats on weekends. I would never wear a blazer with denim, ever. Some do it but to me it looks ridiculous and there is no need to do this.
I completely agree with Man Of Lint on this. I simply see no reason to wear a blazer with jeans.
I have a good collection of sport coats that include cashmere, camel hair, wool, silk and linen fabrics in various patterns of glen plaid, herringbone, houndstooth, basketweave and solid. I also own a solid navy blue blazer with gold tone metal buttons, and a solid black blazer with silver tone metal buttons.
I wear most of the sport coats just as I would a jacket, with jeans, chinos or slacks. I rarely wear a tie with a sport coat unless I am going to a business related social event and I don’t want to wear a suit.
About the only times I have worn my blazers is at trade conferences in a sales booth. I can bring grey slacks and wear either blazer.
To me the proper use of a blazer is when you still want to look like a business professional without being too casual or too dressed up.
The evolution of the sport coat implies that it is a piece of casual attire. The history of the blazer gives it a more formal heritage. In order of formality I would put most sport coats below a blazer, a blazer below a lounge suit (single or double breasted), then a lounge suit with a waist coat, then formal attire (tuxedo and so on…).
To me wearing a blazer with jeans would just seem inappropriate.