Shirtless Sunday: Zac Efron is Packin in Maui

Zac Efron looks smokin hot in Maui earlier this week while swimming at the beach with his younger brother Dylan. Zac's muscles looks even bigger then before, and if you look closely can also see a little bit of his BVD underwear waistband! 15 pictures of Zefron showing his abs inside!

Picture source: Zac Efron Source