Selling a product called “Poisoned blood” on the Internet would usually be a cause for concern.

Thankfully, it’s just the name of a silk and cashmere yarn.

Etsy store DyeForYarn sells over 280 different colors of yarn with odd, evocative names like “I’m pushing a Rhino up the stairs” and “A bat in a dark mood.”

The sanity of whoever’s been naming them was first questioned by “Kendra W” on Twitter.

The storeowners, Nicole and Cordula, explain on their Etsy page that they were formerly biology and molecular medicine scientists, but ditched the lab in favor of dyeing and selling their own yarns.