These Shoes Contain a Drop of Human Blood. Nike Does Not Approve.

Some workplaces encourage employees to donate blood as an act of charity. But six workers at MSCHF, a quirky company based in Brooklyn that’s known for products like toaster-shaped bath bombs and rubber-chicken bongs, offered their blood for a new line of shoes.

“‘Sacrificed’ is just a cool word — it was just the MSCHF team that gave the blood,” one of MSCHF’s founders, Daniel Greenberg, said in an email on Sunday. (Asked who collected the blood, Mr. Greenberg replied, “Uhhhhhh yeah hahah not medical professionals we did it ourselves lol.”)

A drop of blood is mixed in with ink that fills an air bubble in the sneaker, a Nike Air Max 97, Mr. Greenberg said.

“Not much blood, actually” was collected, he said, adding, “About six of us on the team gave.”

MSCHF will sell 666 pairs of the shoes — each pair will cost $1,018 — starting on Monday as a follow-up to a line of “Jesus Shoes,” which contained holy water.

Mr. Greenberg told the news website Insider last year. “We build what we want. We don’t care.”

Satan Shoes” are a collaboration between MSCHF and the rapper Lil Nas X, following the release of a devil-themed music video for his song “Montero (Call Me by Your Name)” in which he gyrates on Satan’s lap.

cheerfully rejoices in lust as a gay man,” wrote Jon Pareles, the chief music critic for The New York Times.

Lil Nas X came out in 2019, and the song’s title is an apparent reference to “Call Me by Your Name,” a novel about a clandestine summer romance between two men that was adapted into a film.

The shoes are affixed with a bronze, pentagram-shaped charm and have “Luke 10:18” — a reference to the biblical passage that says, “I saw Satan fall like lightning from heaven” — printed on them.