Siren, a technology company that developed smart textiles with remote patient monitoring (RPM) applications, announced an additional raise of $9 million for the company's Series B financing. Siren previously raised $11.8 million earlier this year, which was led by Anathem Ventures with participation from existing investors DCM, Khosla Ventures, 500 Startups and Founders Fund. This final close puts the total Series B at nearly $21 million and included participation by all existing investors as well as new investors, such as Manta Ray, Mighty Capital, Portfolia and David Helgason.

Siren is a technology company founded in 2015 by Ran Ma, Henk Jan Scholten, and Jie Fu that has developed proprietary technology to embed microsensors into fabric, allowing for the mass production of affordable, washable smart textiles. Siren's products seamlessly integrate into their users' everyday lives while providing real-time biofeedback to patients and their doctors. Siren's first commercial product is an FDA-registered temperature monitoring sock for the early detection of inflammation that leads to diabetic foot ulcers, which costs the health system over $43 billion a year and leads to over 100,000 lower limb amputations annually in the United States.