These athletes are showing off their “hot” bodies — in more ways than one.

A new calendar created for Gatorade’s “Beat the Heat” program features some of the best sports stars in the world — teaming up to educate young athletes about how to stay safe and hydrated while working out during the hot summer temperatures.

Peyton Manning,who served as “creative director,” personally called up his famous athlete friends to participate in the calendar that PEOPLE has an exclusive behind-the-scenes first look of.

The first athlete Manning dials up is Boston Celtics player Jayson Tatum, 21.

“Jayson, will you be my January?” Manning, 43, asks in the behind-the-scenes video. “Gatorade wants to make a heat safety calendar showcasing hot athletes … Not that kind of hot, sweaty hot. This calendar is teaching people about the importance of hydration.”

After Tatum agrees, Manning reaches out to more athletes, including USWNT player Mallory Pugh, international soccer starLionel Messi, and evengymnast Katelyn Ohashi, who went viral earlier this year forher joyous, perfect 10 floor routine.

Manning then video chats with tennis starSerena Williamsand gives her some heat safety “fashion tips” while asking her to take part in the calendar.

“Light-colored, sweat-wicking clothes are great to help avoid heat exhaustion,” the football star says. “Plus, pastels look great year-round.”

“Are you seriously giving me fashion tips?” Williams, 37, hilariously responds.

Slaven Vlasic/Getty Images; Frazer Harrison/Getty Images

J.J Watt, Serena Williams

The last athlete Manning calls up isJJ Watt, who starred ina videofor last year’s “Beat the Heat” program where he talked about using urine color as an indicator of hydration levels.

“No. I’m not gonna be the pee guy again,” Watt, 30, says jokingly. “I did that last year, I’m done!”

“Urine color is a great indicator for hydration, and you’re the best at telling people that,” Manning replies.

When Watt finally agrees to star in the calendar, Manning responds, “Yes! That’sWattI’m talking about. Get it? Watt?”

“I’m hanging up now,” Watt says.

source: people.com