The "hot dogs" come in two varieties: Classic and 2Hot4U.
The Classic Chicken Tender Hot Dog features two chicken tenders, cheddar cheese, yellow mustard, ketchup, and crispy-fried onions on a toasted sesame and poppy seed bun.
The 2Hot4U Chicken Tender Hot Dog includes two chicken tenders, cheddar cheese, yellow mustard, spicy 2Hot4U sauce, crispy-fried onions, and jalapenos on a toasted sesame and poppy seed bun.
KFC France actually first introduced these in summer of 2019 and brought them back for a limited time this summer.
The concept is actually not all that unusual for KFC as they've also offered a hot dog with a fried chicken bun in the Philippines back in 2015.
Photo via KFC France.