Effects of down comforters blended with functional fibers on subjective sleep quality and sleep EEG.

Effects of down comforters blended with functional fibers on subjective sleep quality and sleep EEG. - Effects of down comforters blended with functional fibers on subjective sleep quality and sleep EEG.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000060744

Enrollment

Registered

2026-02-26

Start date

2026-03-03

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Adults

Interventions

Participants sleep for three weeks using only a down comforter blended with functional fibers as their bedding. Participants sleep for three weeks using only a down comforter blended with standard ray

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Individuals with no history of psychiatric or sleep disorders who provided informed consent to participate in the study. 2. Individuals aged 18 years or older and under 70 years at the time of obtaining consent. 3. Individuals who own a smartphone or PC and can answer questionnaire online.

Exclusion criteria

Exclusion criteria: 1. Individuals currently receiving treatment for chronic respiratory, cardiac, renal, or hepatic diseases. 2. Individuals with systemic skin diseases such as severe atopic dermatitis or psoriasis. 3. Individuals receiving systemic steroids or immunosuppressants. 4. Individuals with a daily habit of alcohol consumption, smoking, or caffeine intake. 5. Individuals who are not in an environment where they can sleep alone. 6. Individuals who use far-infrared radiating materials or similar materials in their daily bedding and clothing. 7. Individuals who do not use down comorters for their regular bedding. 8. Individuals deemed unsuitable by the principal investigator.

Design outcomes

Primary

Measure	Time frame
Sleep EEG; sleep efficiency, sleep latency	—

Secondary

Measure	Time frame
Sleep EEG; total sleep time, total REM sleep time, wake after sleep onset, total N1 time, total N2 time, total N3 time, percentage of REM in TST, percentage of N1 in TST, percentage of N2 in TST, percentage of N3 in TST Pittsburg Sleep Quality Index: PSQI OSA sleep inventory MA version Self-deviced evaluation of sleep restfulness questionnaire Evaluation of comforter usability	—

Countries

Japan

Contacts

Public ContactMayu Murata

Kawada Feather Co., Ltd. laboratory

murata@kawada.net0596-55-2431

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026