I ran across this project while researching stretch sensing technology that is all the buzz right now. This gorgeous project, Aeolia, integrates stretch sensing directly into fabrics. "Each of the back forms incorporates the Merlin stretch sensor into an aesthetic exploration of textile technique mapped to the body." source What's interesting about this exploration is that the circuitry itself is integrated so beautifully and seamlessly into the fabric, that it creates a completely new aesthetic that also has the potential to fit comfortably and flexibly against the body. I would love to get my hands on a sample!
Whatch videos that demonstrate the material here.