Pirelli will introduce its softest tyre sets for the first time in the 2021 Formula 1 season at this weekend's Monaco Grand Prix.
The tyres will run from the hard C3, which was the softest compound available last time out in Spain, to the soft C5, with Pirelli opting for this set on expectations of a one-stop race.
The company's head of F1 and car racing Mario Isola told F1.com it went with the selection due to the ease of warming up tyres around the twisting street circuit and the short lap length.
"Monaco is unique, but its absence from the calendar since 2019 only emphasises its specific characteristics and makes us even more pleased to be going back there," he said.
"Mechanical grip is key to success as is qualifying and strategy, with the renowned difficulty in overtaking.
"This puts the accent firmly on track position, with the drivers having to extract the very maximum from the softest C5 tyre in qualifying.
"Strategy tends to be reactive, with teams making their stops at the moment that gives them the maximum advantage on track, thanks also to a wide pit stop window resulting from the very low tyre wear and degradation."