Kourtney Kardashian and Kendall Jenner are cut from the same cloth ... when it comes to their asses on yachts, that is.
Kourtney and Kendall took a break from the hustle and bustle of the Cannes Film Festival and boarded a yacht in the resort town of Antibes ... which is between Cannes and Nice. Not that geography matters worth a crap ... you're here to see what they're what they're wearing.
Aside from swimwear ... Kourtney showed off her new man, Younes Bendjima -- and had some jet ski time with him and Kendall.