Fart-filtering underwear is selling like crazy.

The British line known as "Shreddies" says its flatulence-filtering underwear uses a carbon back panel to absorb all fart odors.

According to the Huffington Post, "Shreddies" start at $40 a pair and are sold in boxer briefs as well as support boxers.

A spokesman is quoted as saying most of the sales go to Americans and the boxers are good for everyone since everyone farts.