If there's one trend everyone can agree on, it's that wearable tech is the future. According to a report released within days of the 2014 Consumer Electronic Show, the wearable-tech market is expected to hit $5.8 billion in revenue by 2018, up from $750 million in 2012. The growing fervor is spurring companies big and small—and far more fashionable than in years past—to develop new whiz-bang products, from META Pro's holographic interface glasses (coming this July) to LG's Lifeband Touch activity tracker (coming even sooner).
But as new as wearable tech seems, humans have been marrying technology with clothing and accessories for centuries. Below, a tour of devices past, present, and future that qualify as wearable tech—even if the science behind them hasn't always been based on zeroes and ones.