A company that makes 'period-proof' underwear for women has just introduced a more gender-neutral style, as well as a campaign featuring a transgender male model.

Thinx, a two-year-old American brand that sells absorbent, moisture-wicking panties, first made an effort to acknowledge transgender men who still menstruate by changing its tagline from 'For Women with Periods' to 'For People with Periods'.

But now the forward-thinking company has gone a step further, debuting a more gender-neutral boyshort style and casting a 30-year-old transgender male model in its latest campaign images and video.

Groundbreaking: Trans model Sawyer Devuyst poses for a new campaign for Thinx, which sells absorbent, moisture-wicking udnerwear

Enlightening: The 30-year-old Brooklyn-based model shares details about his own transition in a video for the brand, while wearing the new boyshort style

Thinx markets its underwear as a potential replacement for tampons and pads, with the ability to hold up to two tampons' worth on moisture.

The hiphugger, sport, cheeky, thong, and boyshort varieties each come with an absorbent, moisture-wicking, leak-resistant, and anti-microbial insert, which can replace sanitary products and still keep the wearer dry and fresh.

Besides simply making life clear for women - and eliminating embarrassing accidents - the company proclaims to be made up of 'proud feminists', and its mission is to empower girls and women.

About a year go, though, CEO Miki Agrawal noted that the brand had begun receiving 'many gentle reminders' that transgender men often still get periods too.

Transgender men who haven't undergone sexual reassignment surgery for whatever reason - they'd prefer not to have such a major operation, they can't afford it, or they simply don't want to change their genitalia - still have female reproductive organs and menstruate every month.

Easy: The company's underwear is meant to be worn as a safety net or in place of tampons entirely

Everybody bleeds: Past styles have been mostly feminine - including a thong - but the company wanted to be more inclusive of the trans community

'For the trans community, the cycle isn’t just an inconvenience, as it is for so many of us, but rather a frequent, discomforting reminder of an ongoing battle,' Thinx explained in an email.

So the founders of the company decided to help. They began product development on a new style of underwear that didn't include lace or feminine frills and could easily be worn by transgender men.

‘We are here to join the conversation and raise the voices of those affected. We are here to say that bleeding does not make you female, it makes you human,' they explained.

After over a year, this weekend they introduced the boy-short style, which is less girly than previous designs and looked similar to boxer-briefs.

Tough stuff: Sawyer stars in new campaign images as well as a video in which he discusses being transgender and getting a period

Hiding it: The model says he used to wear multiple pairs of underwear under boxers so no one would know he had his period

In addition, Thinx also released new campaign materials starring Brooklyn-based model Sawyer Devuyst, who poses in the new boyshorts and discusses the story of transition.

In an enlightening video, Sawyer begins by reading a letter he wrote as a little girl in second grade. He recalls knowing that he was male from a young age, and finally coming out as an adult in early 20s.

However, Sawyer didn't start taking hormones until he was 28, which meant he spent about five years living as a man but still getting his period.

'I would wear multiple pairs of underwear with a pair of boxers on top of that just to make sure that I didn't leak anywhere and that nobody knew that I had my period,' he says in the clip.

Battling bigotry: Sawyer explained that the rustling noises of changing a tampon can also out a trans man in a public restroom, which could jeopardize his safety in some environements

He goes on to explain that the importance of a product like Thinx for transgender men goes beyond the ease of not having to change pantyliners or worry about stained underwear - it makes men like him feel more secure.

'It's definitely a safety risk,' he says. 'You're in a men's room and somebody hears you rustling paper in the stall because you're changing a tampon. That outs you.'

The company hopes that the spotlighting the gender-neutral style and including a transgender model in its marketing materials helps start a greater conversation and leads to more widespread acceptance.