Nancy Trejos

USA TODAY

Want to sleep like a baby on your next overseas flight? Try Virgin Atlantic's new adult "onesie."

The cheeky British airline is offering the onesie, designed by Norway's OnePiece, to its "upper class," or first-class, passengers starting in mid-June. Only 1,000 passengers traveling on select night flights on Virgin's long-haul network will get to try and take home the one-piece pajamas.

Virgin Atlantic, founded by British business magnate Richard Branson, is calling it the "first ever airline onesie."

Virgin's first-class passengers already get two-piece sleep suits for long-haul flights. The onesie is basically a jumpsuit, yoga pants and hoodie all in one. It comes in black and has the slogan "sleepy head" written on the back.

"The bespoke onesie blends Virgin Atlantic's rock n' roll spirit with design expertise from OnePiece to offer unrivaled comfort for sky-high slumber," the airline said in a written statement.

The airline has even enlisted Duran Duran frontman's Simon Le Bon's daughter Amber to model the onesie.

The Onesie was created in 2007 by three Norwegians in their 20s who "fantasized about the ultimate chillout wear, perfect for the lazy Sunday at home," the onesie's packaging says.

The designers sewed together a hooded sweatshirt and a pair of sweatpants to come up with the outfit.

"We are passionate about new innovations such as bringing our Upper Class passengers the first ever airline onesie," Fay Burgin, head of Global Public Relations for Virgin Atlantic, said in a written statement. "OnePiece onesies are the original and best and our design teams have been working tirelessly to create a onesie that offers the perfect combination for a satisfying slumber on one of the longest, fully flat, beds in business class."

The onesies are unisex. Even Branson has been known to wear one.