Born in Kisslegg in southern Germany, Lupfer studied fashion at London's University of Westminster — alma mater of Vivienne Westwood and Christopher Bailey — graduating in 1997 with first-class honours; his final-year collection was bought by London boutique Koh Samui and sold out in two weeks. He made his prêt-à-porter debut at London Fashion Week in 1999. Vogue.com's Sarah Mower praised how his sequined sweaters draw a surprisingly broad following, striking a balance between easy and dressed-up, witty and smart.
The brand sells through Harrods, Selfridges, Harvey Nichols, Net-A-Porter, Le Bon Marché and more, and launched e-commerce in 2014. Lupfer won the British Fashion Council's New Generation Award in 2001, Best Designer of the Year at Spain's Prix de la Mode in 2008, and International Designer of the Year at the Scottish Fashion Awards in 2010.