Zac Efron‘s back, and sweatier than ever.

After significantly cutting down on his Instagram use since September, the actor, 32, returned with a bang by posting a seriously steamy shirtless shot of him hanging out in a sauna.

The revealing photo shows him leaning back with his best ‘smize’ as he holds one leg up comfortably on the bench. Efron accompanied the picture with a simple caption of emojis and a tag for Clearlight Sauna, a company that makes saunas to install anywhere. The company later shared the actor’s shot on its Instagram Story.