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Peer Reviewed Clinical Study:  Sleep Quality Improvements in Hot Sleepers

A peer-reviewed pilot study, published in Frontiers in Sleep (2025), was conducted by investigators from the Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women’s Hospital, together with the Division of Sleep Medicine, Harvard Medical School.

The study evaluated adults who self-identified as “hot sleepers” before and after using sheets made of 100% cotton treated with Xirotex™ Cool technology. Results demonstrated statistically significant improvements in overall sleep quality and duration, as well as measurable reductions in the frequency and severity of night sweats.

+26

minutes average nightly sleep gain

33%

of participants reported night sweats eliminated

69%

reported improved overall sleep quality

READ THE FULL PUBLISHED STUDY
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Clinical Study Key Findings

In a peer-reviewed clinical pilot study, researchers analyzed over 2,600 nights of sleep data to assess how temperature-regulating sheets made with Xirotex™ Cool fabric affected sleep quality in adults who sleep hot.

  • Sleep Duration: Users slept an average of 26 minutes longer each night-and fell asleep faster.
  • Night Sweats: 42% reported a reduction in severity, 33% of participants had their night sweats eliminated entirely.
  • Sleep Quality: 69% of participants reported improved sleep quality.
Read the Full Report

Study At A Glance

Developed to help reduce heat accumulation during sleep, the sheets were studied for their ability to promote comfort among adults who often wake from feeling overheated.

  • Design: Non-randomized, pre–post pilot study; within-person comparison before and after sheet use.
  • Participants: 64 adults (89% female; mean age 48) who identified as hot sleepers.
  • Duration & Data: 6 weeks total; 2,627 nights of diary data collected.
  • Intervention: LUSOMÉ sheets (100% cotton, treated with Xirotex™ Cool).
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“Results of this pilot study reveal that, after introducing the cooling bed sheets, there was a significant improvement in sleep quality, as measured by both subjective sleep quality scores and sleep duration. These findings suggest that temperature regulation during sleep may play a critical role in improving overall sleep health and comfort.”

📄 Source: Frontiers in Sleep — A non-randomized pre-post pilot study of cooling bed sheets in hot sleeping people

The Founders Overview of Our Clinical Trial Results

Lara Smith, Founder and CEO of LUSOMÉ recaps our clinical trial results of LUSOMÉ Temperature Regulating sheets—highlighting XIROTEX™ Cool technology.

Lusomé is committed to advancing evidence-based innovation in sleep wellness through partnerships with researchers and institutions dedicated to improving women’s health.

Summary

The findings suggest that the use of temperature-regulating sheets may support better sleep in adults who experience night sweats or overheating during the night. Participants in the study experienced longer sleep duration, improved subjective sleep quality, and reduced night-sweat frequency. The results provide early evidence that textile-based temperature regulation may be a promising strategy to improve comfort and rest among individuals who sleep hot.

Read the Full Peer-Reviewed Study in Frontiers in Sleep

Disclaimer

This page is intended for informational purposes only. It summarizes findings from an independent, peer-reviewed study and does not constitute medical advice. The study evaluated one type of Lusomé bed sheet using Xirotex™ Cool fabric; results may not generalize to all products or individuals.

LUSOMÉ'S Sheets Perform Better

Independent lab testing shows Lusomé Sheets regulate temperature up to 5°C, no other “cooling” brand comes close.

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Test Methods:
1. Differential Scanning Calorimeter (DSC) Measures Heat Absorption
2. Surface temperature: Hot Plate + Multichannel Thermometer to visualize surface temperature

Explore Our Award Winning Sleep Technology

Our innovative XIROTEX™ Cool technology powers LUSOMÉ’s temperature-regulating sheets. Learn how our fabric works like a shield against heat buildup, regulates temperature, and creates unmatched sleep comfort. Our sheets deliver deep, uninterrupted rest—trusted by experts, loved by those who sleep hot.  

Shop Our Sheets

LUSOMÉ'S Promise

With more than 12 years of experience in the sleep space, LUSOMÉ understands exactly what people need to achieve the perfect night's sleep, leading to the creation of our advanced temperature-regulating sheets.

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R&D Commitment

Our fabrics undergo multi-stage R&D and third-party lab testing to confirm temperature regulation and fast-dry comfort—because better sleep deserves evidence.

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Scientifically Proven

Our products are scientifically proven to enhance sleep quality and comfort, ensuring you wake up feeling refreshed every morning.

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Award-Winning

LUSOMÉ's innovative sleepwear and bedding solutions have earned numerous awards for their exceptional design and effectiveness.

About the Sleep Matters Initiative

Division of Sleep and Circadian Disorders

The Sleep Matters Initiative (SMI), led by clinicians and researchers, aims to implement evidence-based clinical treatments for sleep and circadian disorders, and to change the culture of sleep. SMI aims to improve health, safety, performance and well-being of people worldwide by translating cutting-edge research on sleep and circadian rhythms into practice.

Sleep, nutrition and exercise are the three pillars of good health. Too often, evidence-based practices to promote healthy sleep fail to reach widespread societal awareness or adoption. Sleep deficiency and untreated sleep disorders take years off our lives, compromise safety in the workplace, and cost the economy billions of dollars each year. The SMI is seeking to change this by continuing innovative research programs, advocating for sleep and circadian-friendly policies, and by developing easy-to-use, evidence-based interventions, such as our comprehensive Sleep Health Wellness Program and educational offerings for high schools, colleges, and businesses.

To date, the SMI has helped more than 25,000 police, firefighters, healthcare providers, laborers, and even astronauts. They have published impactful research in the New England Journal of Medicine, JAMA, Science, and Nature; served in leadership positions for national organizations advocating for sleep health; and are recognized as worldwide experts in sleep and circadian rhythms. Increased awareness and knowledge of core sleep and circadian principles are relevant to people in all walks of life

Read the Full PUBLISHED STUDY
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frequently asked questions

"Scientifically designed to eradicate night sweats for good"

In lab tests that grade how well fabrics handle sweat (from 1 to 5), Xirotex™ scored a perfect 5 — pulling moisture from your skin and evaporating it fast to keep you dry and comfortable.