Khloe, who recently dyed her hair brown, paired the hoodie with a fitted black latex miniskirt and white sneakers.
Though Disick and Richie, 21, split in May after almost three years of dating, the exes were spotted together on a beach in Malibu, California, on Saturday. Disick also liked Richie's pic of her wearing the same hoodie as Khloe, and the Talentless account commented with a fire emoji.
Disick's other famous ex, Kourtney Kardashian, made headlines last month when she posed in one of his flannel shirts while on a joint family vacation. Disick and Kourtney have three kids together, are both featured on Keeping Up With the Kardashians, and still spend a lot of time with each other. The Kardashian-Jenner family even threw Disick a birthday party shortly after his split from Richie.