Knickers, made from planet friendly fabrics, have been fast disappearing from the British shelves.
The idea of fair trade organic knickers came to Sarah Lucy Smith for her final project while studying the Eco Design course at Goldsmiths University.
She later joined forces with school friend Rose Cleary-Southwood and thus GreenKnickers came about.
And now the zero carbon pants are so popular that they have been flying off the shelves and a new wedding range is planned next in line.
"We started GreenKnickers to prove that ethical can be funny, beautiful and sexy. The fabrics are so gorgeous, and super-duper green," Sky News quoted Sarah as saying.
"They're selling extremely well. Some customers say they're the comfiest knickers they've ever worn," she added.
The global warming undergarments, made from fabrics such as organic cotton, hemp and silk, reaches in a box made from recycled paper.
A pair, costing up to 25 pounds, plus 3 pounds for postage and packaging, even changes its colour as it warms up due to thermo-chromic inks.