Another classic menswear piece that should be in your closet is The Chambray. Let's clarify this first, people would think this is a denim shirt, it is not.
Chambray is a type of woven fabric, mostly made of cotton. It's more dense and durable, distinct by a horizontal bleach threads. Most famous color would be blue but they also come in many other colors.
Chambray has become staple item in men's casual wear but these days you can even wear it with suits and tie as well.