Rimmel London Lasting Finish Matte Lipstick by Kate Moss in 111
This is O associate beauty editor Alessandra Foresto's favorite red lipstick. We have watched it withstand triple-digit temperatures, dressing-drenched salads and multiple cups of coffee—sometimes all in one day. Its color stays vibrant, and it doesn't smear. Best of all: Foresto swears it never feels tight or dry.

($5.50, drugstores)

Next: O's summer beauty survival handbook