The tuxedo jacket usually features either a shawl or peak-collar lapel, traditionally done in ... stripe running from the ...

On Jai Lennard, photographer: Wool coat ($2,830), cotton vest ($860), and mohair trousers ($890) by Prada; cotton tuxedo shirt ($645 ... wool, peak lapel) is the classic tux because it works ...

As to the rest of your question: If your jacket lapels are peaked, the vest should not be notched. You might consider going with a peaked-lapel vest under a peaked-lapel jacket only if the vest ...