The capabilities of wearables continue to evolve, but there’s one feature that may give a real boost to adoption of the devices.

That feature is the ability to pay for something via a wearable device, such as a smartwatch or fitness tracker.

The majority (60%) of consumers say they would be interested in using a contactless form of payment, like by a smartwatch, to pay for something while exercising, according to a new study.

For millennials, it’s even higher, with 80% interested in using a wearable device for paying while exercising. For baby boomers, that number is 38%.

The study comprised a survey of 1,000 adults in a representative sample of the U.S. population conducted by Wakefield Research for Visa.

Almost half (49%) of consumers say they have wanted to make a purchase immediately before or after exercising but could not because they didn’t have a form of payment with them. Even more (70%) millennials felt the same way.

More than half (57%) of consumers say they have put a form of payment somewhere while exercising. Here’s where consumers put their form of payment while they exercise or work out:

56% — In a pocket

32% — In a sock or shoe

24% — Inside the waistband of pants or shorts

24% — In undergarments, such as underwear or bra

18% — Held it in their hand the entire time

8% — Put in in a hat

A third (33%) of millennials put their payment method in their undergarments, compared to 14% of baby boomers.

Most Americans (71%) carry some form of payment with them while exercising or working out but fewer than a third (28%) have it in a smartphone or wearable device.

That’s an opportunity for smartwatches and fitness trackers, since many of those exercising or working out already have that device literally on them.

Chuck Martin, The daily Connected