Owlet baby socks discontinued after FDA warning. Parents argue device offers 'peace of mind.'

Owlet’s Smart Socks, baby monitoring socks programmed to track a baby’s sleep patterns, have halted sales after a warning letter from the U.S. Food and Drug Administration.

The FDA stated the socks were medical devices since they provide heart rate and oxygen levels but Owlet claimed the smart socks were "low-risk products." In the warning letter, the FDA said the company has sold the product without proper “marketing approval, clearance, or authorization” from the FDA.

As of Tuesday morning, the Owlet Sock family of products is "currently unavailable,” according to the Smart Socks’ product page, and thousands of parents are unhappy.

"Keeping this product on the market would ensure peace of mind for millions of parents and quite literally save lives by alerting parents to an issue before it’s too late," Caitlin Needham said in her petition to keep the Smart Sock.

The petition has garnered over 150,000 signatures of concerned parents who say the Smart Socks give them "peace of mind."

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When questioned on whether customers can continue using the Smart Socks, the company said "the product’s functionality has not changed at this time. We will notify customers of any updates to the Smart Sock products that have already been distributed."

"We're all signing the petition with one goal in mind, to save the Smart Sock so it can one day save another parent from a headache or lack of sanity," Smith said.

Follow Gabriela Miranda on Twitter: @itsgabbymiranda