Masimo has announced a groundbreaking update to its advanced health-tracking wearable, the Masimo W1® Sport. The new feature, Sleep Halo™, offers scientifically based sleep analysis, setting a new standard in sleep tracking technology.
Unmatched Sleep Data Tracking and Comprehensive Sleep Insights
Sleep Halo™ delivers unparalleled overnight sleep data tracking, recording over 70,000 daily measurements of second-by-second continuous health data. This feature leverages continuous Masimo pulse oximetry and machine learning to provide in-depth insights into sleep quality.
The insights include overall sleep timing, duration of sleep stages, periods of rest and wakefulness, and episodes of desaturation. These metrics culminate in a Sleep Halo score, an algorithmic calculation that represents overall sleep quality, visualized through the companion Masimo Health smartphone app.
Sleep Halo™ will be a staple feature in all future Masimo wearables, including the upcoming Masimo Freedom™ Watch and Band. Existing Masimo W1 Sport owners can soon update their watch firmware and Masimo Health app to start utilizing this advanced sleep-tracking feature.
Commitment to Scientific Accuracy
Joe Kiani, Founder and CEO of Masimo, expressed excitement about the launch of Sleep Halo™ for Masimo W1 Sport. He highlighted Masimo’s 35-year dedication to improving lives through breakthrough engineering. Unlike other wearables that rely on intermittent and often inaccurate data, Masimo W1 provides a robust analysis of sleep using accurate, continuous measurements.
Benchmarking Against EEG and Other Wearables
Kiani emphasized the scientific backing of Sleep Halo™, noting that it has been benchmarked against EEG data to ensure the accuracy of sleep stage analysis. This commitment to scientific rigor distinguishes Masimo W1 from other consumer wearables that use unreliable metrics.
Today’s consumer wearables often provide unreliable sleep metrics based on intermittent data and movement. In contrast, Masimo W1, utilizing Masimo SET® technology, offers significantly more accurate sleep analysis. This technology is the primary pulse oximetry method used at the top 10 U.S. hospitals, according to the 2024 Newsweek World’s Best Hospitals ranking.
Bringing Reliable Sleep Analysis Home
Sleep Halo™ has been rigorously tested against reference laboratory measurements, including EEG data. This testing ensures that users receive reliable, insightful sleep analysis nightly via a lightweight, comfortable wearable from the convenience of their own home.
Availability and Additional Products
Masimo W1 Sport is available for purchase at Masimo.com. Existing owners can soon update their devices to include Sleep Halo™.
Also available is the Masimo W1 Medical, the first and only FDA-cleared watch providing continuous, real-time SpO2 and PR measurements, with indicators for when these metrics are outside normal ranges.
Masimo W1 Sport, with the new Sleep Halo™ feature, is set to transform sleep tracking by providing scientifically accurate, continuous health data. This innovation underscores Masimo’s commitment to improving health and wellness through advanced technology.



