Brandon Flynn for Calvin Klein.Photo:Alithea Castillo and Kim Tin

Alithea Castillo and Kim Tin
AllBrandon Flynnneeds this holiday season is his Calvin Klein underwear.
This year, the13 Reasons Whyactor and longtime ambassador of the brand stars in Calvin Klein’s new Holiday 23 campaign, rooted in the celebration of gift giving.
Brandon Flynn for Calvin Klein.Alithea Castillo and Kim Tin

In exclusive behind-the-scenes photos shared with PEOPLE, Flynn, 30, reveals what’s underneath his holiday-wear, including a tight pair of briefs (CK’sFuture Shift Holiday Low Rise Trunksto be exact) — and nothing else!
The featured monochromatic undies come in four different colors, but Flynn keeps it classic in his maroon pair.

In the BTS pictures, Flynn flaunts his toned physique — including his chiseled abs — and showcases his collection of tattoos.
To make things even hotter, he shows off his best heartthrob poses, from the swoon-worthy muscles to the seductive lip bite. Basically, Flynn is the full package and the gift that keeps on giving this holiday season.

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up to date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.
PEOPLE recently caught up with the actor on hiscurrent style M.O.and he revealed the three clothing items he wears to make him feel most like himself: Speedos, jeans and a T-shirt, and he wears the second and third together. In short, he’s a classic kinda guy when it comes to style.
Thankfully, Calvin Klein has all three and much more under itsHoliday collection, available to shop online atcalvinklein.com.
source: people.com