Survivor Celebrates #NationalUnderwearDay

In honor of National Underwear Day, check out some photos of castaways in their skivvies.

Phillip's famous underwear

Phillip made pink underwear famous in Survivor: Redemption Island.

Andrea took a dip in her underwear during the premiere episode of Survivor: Caramoan Fans vs. Favorites.

These beauties hung out in their underwear during the season premiere of Survivor: Cagayan

Brenda walked around camp in her skivvies during Survivor: Caramoan Fans vs. Favorites.

Morgan cooled off in Survivor: Cagayan.

Natalie shows off her beach bod while wearing underwear.

Ozzy wore his boxer briefs instead of swim trunks in Survivor: South Pacific.

Cliff shows his brawn in Survivor: Cagayan.