Who doesn’t love a good Kmart hack?

Single mom Belinda Greer definitely does and she’s boldly crediting her trusty $10 undies from the budget superstore with saving her life.

The mom of three from Melbourne, Australia, told news.com.au her nude striped underwear, which she “lives in,” recently “saved” her from a terrifying gang of youths.

Confused? Let me explain.

After a few wines last Friday night, the 33-year-old from West Melton pulled on her trusty undies and climbed into bed — only to be woken by loud noises and raised voices outside.

“I jumped up and looked out of the window. There must have been about 20 youths on my driveway, smashing bottles and leaning against my car,” she told news.com.au.

Without thinking, she ran outside telling them she’d called the police and they were on their way.

“I couldn’t believe it when the mob started running away from me. I was in disbelief,” she said.

But just as Greer was about to praise herself for her stellar efforts, one of the youths called out something nasty.

“They told me to get back in my house because I was naked and they didn’t want to see it,” she said.

“I jolted back inside and burst out laughing. My favorite high-waist undies had literally saved me from a scary gang — it’s the best security system ever.”

Greer, who has three kids under 6 and had her young nephew staying over that night, shared the humorous tale to the Facebook group “Kmart home decor & hacks Australia,” where it quickly caught the attention of amused group members.

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“I knew they were comfy security, but I did not know they came with house security powers as well,” one person wrote.

“I’ve got these undies, they are so comfy,” another said.