HygeiaSleep Global Sleep Score™ (GSS™)
The GSS™ evaluates the real factors that influence how well guests sleep — hygiene, air quality, bedding, light, noise and environmental conditions — and provides each property with a clear 0–100 score and Cloud Rating™.
Developed by HygeiaSleep – The Global Authority on Sleep Hygiene
Supported by over 2 million monthly viewers on the Sleep Clean YouTube channel.
Dont Just take our word for it!
Sleep Clean is now one of the most influential platforms shaping how travellers evaluate sleep environments, making sleep quality a defining factor in hotel choice.
What is the Global Sleep Score™?
The Global Sleep Score™ (GSS™) is an independent, evidence-based assessment of a hotel’s sleep environment, resulting in a 0–100 score and a Cloud Rating™ guests can trust.
The Five Global Sleep Pillars™
1. Sleep Surface Hygiene™
Mattress cleanliness, allergen control, moisture levels, protective systems and hygiene protocols.
2. Air Environment Quality™
Ventilation, air purity, filter performance, humidity balance, airflow consistency and odour control.
3. Light & Noise Regulation™
Light leakage, blackout performance, external noise, internal noise, acoustic insulation and sleep disruption triggers.
4. Bedding Comfort & Cleanliness™
Pillow and duvet quality, linen cleanliness, materials, laundry hygiene, temperature regulation and replacement cycles.
5. Guest Sleep Support™
Sleep amenities, pillow options, comfort tools, blackout systems, sleep-enhancing features and overall guest sleep experience.
The Cloud Rating™ – A Simple Visual Standard
Cloud 5 — Exceptional
Outstanding performance across all five sleep pillars.
Cloud 4 — Advanced
Strong environmental control and consistently high standards.
Cloud 3 — Certified
Meets GSS™ criteria for a reliable, healthy sleep environment.
Cloud 2 — Developing
A solid foundation with clear opportunities to enhance sleep comfort.
Cloud 1 — Foundational
Early-stage alignment with GSS™; targeted improvements recommended.
How GSS Works?
WHY HOTELS USE GSS™
