Two women worked out in almost nothing but body paint in a bid to see whether other gym-goers would notice their outfits—or lack thereof.

Fitness fans Sarah Reilly and Maria Luciotti, 30, partnered with body painter Jen Seidel for the experiment, which saw them asking for a tour at a gym in Baltimore, Maryland, while wearing nothing but thongs, nipple pasties - and body paint.

The paint made it look as though Sarah and Maria were wearing leggings and bras, and was so realistic several people were none the wiser.

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Experiment: Sarah Reilly (left) and Maria Luciotti (right) worked out in almost nothing but body paint in a bid to see if other gym-goers would notice their outfits—or lack thereof

Team: Both women partnered with body painter Jen Seidel for the experiment, which saw them donning only nipple pasties and thongs underneath their make-up

Body art: Jen and her painting partner prepped Maria and Sarah (pictured) by giving them faux sports bras before their trip to the gym

Details: The body paint (pictured on Maria) even included tiny white dots to mimic the texture of workout clothing

Jen and her painting partner designed a purple, grey and pink ensemble on Maria, complete with faux capri pants.

Sarah, meanwhile, seemed to be modeling a grey and hot pink outfit with a geometrical pattern, but of course, it was all the result of Jen's handiwork.

Together with Jen, Sarah and Maria went to a Planet Fitness location and asked for a tour of the gym. An employee thus began showing them around, apparently not noticing anything special about Sarah and Maria's clothes.

Sarah and Maria explored several areas of the gym and even tried out a few moves on steppers before Jen finally asked the employee to take a closer look at the duo's outfits.

It was only then that the employee realized that Sarah and Maria were wearing body paint in lieu of clothing. She promptly reassured the group that it was OK, and that staff members wouldn't prohibit something they couldn't even notice.

Ready! Maria (left) and Sarah (right) didn't seem nervous to venture inside a gym wearing little more than body paint for the experiment

Time to run: Together with Jen, Sarah and Maria went to a Planet Fitness location and asked for a tour of the gym, during which they hopped on the treadmills

Working up a sweat: The trio also lifted weights among oblivious gym-goers who didn't appear to notice anything

Staying power: At first, the paint stayed in place while Sarah (pictured) and Maria went through their workout session

It did the trick! Maria (pictured) and Sarah spent a good amount of time in the gym without any problem despite their barely-there outfits

Stunned: The gym employee (left) who showed the trio around didn't realize the women were wearing body paint until Jen directed her to take a closer look

Taking a double take: A man prompted to look at the women's outfits took his glasses off and put them back on before exclaiming: 'Oh!'

Maria and Sarah then headed to the weight machines section to continue their workout. There, they interacted with a couple more gym-goers, including a man who, once prompted to look at the women's outfits, took his glasses off and put them back on before exclaiming: 'Oh!'

'I haven't had my glasses fixed in, like, two years,' he said, confirming that he hadn't been able to tell that the two weren't wearing real clothes.

He then asked what body painters do 'below the waist', and was told that Maria and Sarah were simply wearing underwear along with the body paint.

Maria and Sarah then had to stop the experiment because they worked up such a sweat, the make-up started melting off their skin.

The video of the experiment has gathered 21,566 views over the course of just four days, and Maria pointed out that the body paint 'hack' could be a genius way to get out of doing laundry.