Is the first row of buttons on a double breasted jacket functional

Suit Buttons: What Every Man Needs to Know

How to add a personal touch to your jacket through customization or embellishments - Quora

Double Breasted Suits vs. Single Breasted Suits – StudioSuits

Why is there an extra button on coat sleeves? - Quora

Can you raise a jacket's armhole? - Quora

How many buttons are you comfortable leaving open on a blouse or dress shirt? - Quora

Variations on the Double-Breasted Jacket: Buttons, Wrap and Lapel

Why is it hard to find brand new three or four buttons front of a suit jacket these days? - Quora

What is the origin of buttons on men's jacket cuffs? I can't see a function for them. - Quora

Double-Breasted Suits for Men: The Ultimate Guide - Suits Expert

The Art of Looking Good: Buttoning Your Suit Jacket - Joe Button

The double-breasted suit is back in style

Why do suit jackets have fake pockets? - Quora

Why do some men (even some in senior business positions) wear button-down shirts with 3+ buttons undone, so you can see a bunch of their chest hair? - Quora