Isabel Marant for Gap
Credit: Courtesy of Gap; Getty Images

French fashion designer Isabel Marant—who is loved by celebrities like Katie Holmes, Heidi Klum, Kate Moss, and moreteamed up with Gap to design a tee to mark World Aids Day for the retailer’s (PRODUCT)RED collection. The color-splashed heather gray V-neck is meant to have a slouchy fit, which is Marant's understated signature, and 50% of all profits will go to the Global Fund to help eliminate AIDS in Africa. Find the limited-edition tee for $24.95 at now, and in stores starting Black Friday, just in time for World Aids Day on December 1st.

See more cause-supporting Ts in the gallery!