Kourtney Kardashian bared her backside in a revealing thong swimsuit while vacationing with husband Travis Barker and son Rocky.

In photos obtained by Page Six, the Poosh founder rocked a black one-piece swimsuit while stepping into the water in Miami Wednesday.

The reality TV star, 46, was also snapped pulling a matching black coverup skirt over the swimsuit. She wore a pair of chic black sunglasses for the late summer beach day, later clutching Barker’s arm as he carried their one-year-old son on his other arm.

The Blink-182 drummer’s chest and arm tattoos were on full display, as he wore nothing but a pair of tan shorts and tennis shoes for the balmy outing.

In other pics, the trio waded into the water for some fun in the sun. Rocky wore a print T-shirt and red shorts to protect his

See Full Page