Warning for MRI researchers: Unexpected clothes (e.g., yoga pants) may contain metal

Lululemon uses what it calls silverescent technology, according to information on some Lululemon clothing. The technology purports to stop odour-causing bacteria from embedding itself into the clothing.

But according to Alison Matthews David, an assistant professor at Ryerson University, silver or metal fibres can turn up in other brands but you may not know it.

“If you see the label, anti-microbial, in other words it kills microbes or bacteria, it mostly like does that with silver technology. Nano silver technology,” she said.