Underwear that counts steps, tracks calories, monitors sleep? Count me in!

It’s what you’ve been waiting for (though you may not have realised it) –  in the ho-ho-ho opening lede of IdeaConnection’s story: “the comfortably smart underwear from Skiin takes a bottoms-up approach to health monitoring.”

All sounds fantastic, but I don’t quite find much information on how effective it is in the more traditional role of underwear … how many pairs would one need?