Sábanas refrescantes y cómodas

Tested by a customer, on his own sleep tracker

He sent us the data unprompted. We’ve published all of it, including how the tracker works.

Customer case study · measured, not claimed

The night the waking stopped

A customer replaced his existing premium sheets with ours and sent us what his sleep tracker recorded on either side of the change. Both nights, side by side.

Night 1 · his old sheets

Seven returns toward awake

Night 2 · Cozy Cooling Sheets

One continuous block

Sleep quality73% → 79%+6 points

Time asleep5h 55m → 6h 39m+44 minutes

Time in bed6h 43m → 7h 37m+54 minutes

“I tried your product yesterday, replacing a very expensive set that I had, and the difference is amazing.”
Michel A. · sent to us unprompted, the day after

He wrote to us first

None of this was solicited — no review request, no discount for posting, no brief. He bought the sheets, slept on them, and sent this the following afternoon.

Michel A. Instagram direct message

Just wanted to say WOOOOW WOOOOW WOOOOW… I tried your product yesterday, replacing a very expensive set that I had, and the difference is amazing… I’ll share with you the sleep pattern I had… Really appreciate the work put into it and your quick shipping and delivery… Thank you for making my sleep better

*it took me longer to sleep cause I was free falling through the internet rabbit hole trying to figure out the type of fabric you used and why it’s magical like that

What changed, and what didn’t

SubjectMichel A., verified customer

Change testedSwapped his existing premium sheet set

DesignNight 1 vs. Night 2, back to back

InstrumentSleep Cycle, on his own phone

Same bedroom, same bed, same phone in the same place, same app in the same mode, one night apart. That’s what makes the two graphs comparable to each other.

Both nights, on one clock

His two screenshots covered slightly different hours, so we’ve redrawn both on a single shared time axis. The underlying figures are his, unchanged.

Night 1 · previous sheets In bed 6h 43m · Asleep 5h 55m · Quality 73%

Night 2 · Cozy Cooling Sheets In bed 7h 37m · Asleep 6h 39m · Quality 79%

On the second night he took 57 minutes to fall asleep — the flat stretch at the start. His own explanation: he was up reading about what the fabric was made of.

What this shows

That one customer’s tracker recorded a fragmented night on his old sheets and a continuous one on ours, twenty-four hours apart, with the sheets as the variable that changed.

Because both nights were measured the same way, on the same device, in the same room, they can fairly be compared to each other. A single case can’t tell you what would happen for everyone — it tells you what happened for him.

Sleep data voluntarily shared by a Cozy on Cozy customer and redrawn from his own Sleep Cycle screenshots; the underlying figures are unchanged. Quoted with his permission, surname withheld at his request. Single subject, two consecutive nights — individual results vary.
Cozy Cooling Sheets are a comfort product, not a treatment for any medical condition.

The instrument

Sleep, measured by sound

Sleep Cycle is one of the most widely used sleep trackers in the world, and it works without anything on your wrist or under your mattress. The phone sits on the nightstand and listens. The method is patented, and the company has built one of the largest sleep datasets in the world from tens of millions of users.

How it works

STEP 01

It listens

The microphone picks up the sounds of the bed — breathing, shifting, turning over, snoring.

STEP 02

It separates signals

Rustle reads as movement. A slow steady rhythm reads as breathing. Sharp peaks get flagged as snoring.

STEP 03

It reads the pattern

A trained model tracks how much you move and how regular your breathing is, minute by minute.

STEP 04

It draws your night

That becomes the curve you see in the morning, plus your times and your quality score.

Why listening tells you something real

Sleep genuinely changes how a body behaves, in ways you can hear from across the room. Awake in bed, you shift often and your breathing is irregular. As you fall asleep, movement drops away and breathing settles into a slow, remarkably even rhythm. Those are real physiological changes, not statistical artefacts.

Movement falls off and breathing locks into a slow, even rhythm — then both reverse in the morning. This is the pattern the app reads all night.

What it reports

Time in bed & time asleep

The window the night sits inside, and how much of it was scored as sleep.

Sleep quality

A single percentage summarising duration, continuity and how the night compares to your own pattern.

Sound events

Snoring, coughing and talking, logged with timestamps.

Sleep Cycle is an independent third-party app developed by Sleep Cycle AB. Cozy on Cozy has no commercial relationship with them and receives nothing from mentioning the app. It is a consumer wellness app, not a medical device. Technical description drawn from Sleep Cycle’s own published documentation.

Diseñado para responder a las necesidades de temperatura de tu cuerpo: despiértate renovado, no congelado.

Tejidos con tecnología Cozy Cooling que garantizan que tu cuerpo se mantenga a la temperatura perfecta. Toda la noche.

Tejido más fresco = menos sudor = menos olor = menos ropa sucia

Las sábanas Cozy Cooling se mantienen frescas 3 veces más tiempo que las de algodón gracias a sus propiedades antibacterianas. Esto significa hasta 3 veces menos colada y menos olores.

Sensación sedosa que dura años.

Telas OnCozy™ de primera calidad que se sienten más lujosas que la seda y se mantienen suaves sin importar cuántas veces las laves.

Diseño inteligente para un entorno de sueño más limpio

tecnología de enfriamiento confortable + propiedades antibacterianas naturales dan como resultado:

V/S

Less sweat

More deep, undisturbed sleep

Less odors

More fresh starts to your days

Less pimples

More confidence in your own skin

Less bedheads

More wake up-and-go mornings

Adiós a la congestión matutina

Nuestros tejidos con certificación OEKO-TEX están diseñados para un descanso hipoalergénico, asegurando que no sufrirá de congestión nasal, garganta irritada u ojos hinchados al despertar por la mañana.

El 88% de los clientes encuestados informó un mejor descanso

Miles de nuestros clientes se están despertando más descansados y llenos de energía gracias a un sueño más profundo. No dejes que la congestión matutina o los constantes cambios de temperatura arruinen tu sueño.

Nadie ofrece confort mejor que nosotros

Desde 2019, hemos mejorado la vida de más de 100.000 clientes al encontrar soluciones fáciles y prácticas que se adaptan a su día a día.

Garantía de devolución de dinero de 30 noches

Estamos tan seguros de que le encantarán estas sábanas que le dejaremos probarlas durante 30 noches. Si no le gustan, le reembolsaremos todo su dinero, sin hacer preguntas.

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Overall rating: 5.0 / 5 from 6081 reviews.

Cool

Fadia M. 5/5 Verified September 16, 2025

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