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Hang onto your knickers!

Now that David Beckham has already had his go at modeling underwear (he was the body of Emporio Armani underwear for four seasons), he's taking a stab at designing it by launching a new collection of designer thermal underwear, also known as "long johns."

The L.A. Galaxy soccer star wants to give the old-fashioned items a makeover, which will hit stores in February 2012 just in time for Valentine's Day.

"The underwear is totally my designs, and are things that I like to wear," Beckham told U.K. newspaper The Sun.

And while some think of the waffle-knit undies as what you wear beneath a snowsuit, the 36-year-old Brit sports them in a different capacity.

"I sometimes wear them to go to sleep -- they're very cool," added Beckham.

Something tells Us that wife Victoria Beckham doesn't mind in the least bit.