The premium down duvet, as soft as a cloud.
Your body works during the night — even when you don’t notice it. The better your sleep climate, the more of that energy flows back into you. Into your recovery. Into your next day.
Three warmth options, tailored to your preference and the season. So you wake up the way you deserve.
Swiss engineering. Handcrafted in Germany.
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The duvet was just the beginning. Experience the full system - free in-home consultation.
Summer Duvet
135 × 200 cm – 200 g
140 × 200 cm – 200 g
155 × 200 cm – 250 g
155 × 220 cm – 300 g
200 × 200 cm – 350 g
200 × 220 cm – 400 g
All-Season Duvet
135 × 200 cm – 400 g
140 × 200 cm – 400 g
155 × 200 cm – 500 g
155 × 220 cm – 600 g
200 × 200 cm – 700 g
200 × 220 cm – 800 g
Winter Duvet
135 × 200 cm – 750 g
140 × 200 cm – 750 g
155 × 200 cm – 950 g
155 × 220 cm – 1,100 g
200 × 200 cm – 1,300 g
200 × 220 cm – 1,500 g
Materials
- Filling: 100% down (no live plucking)
- Cover: 100% premium organic cotton
- Storage bag: 100% wool (natural felt)
Certifications
- NOMITE® – suitable for allergy sufferers
- OEKO-TEX® Standard 100 – Confidence in Textiles
- Highest animal welfare standards – guaranteed no live plucking
Care
- Shake out and air regularly
- Machine wash at 40 °C on gentle cycle
- Tumble dry on low, multiple cycles if needed
- Do not dry clean
- Store cool and dry in the felt bag
Free DHL shipping (orders over €120). 4–5 business days. Freight delivery only with Sleep System. 14-day returns, full refund. Swiss Engineering Quality guarantee.
If your body fights heat or cold under the duvet,
it spends the night regulating instead of recovering.
You wake up tired — no matter how long you slept.
The SEVEN SUNDAYS Premium Down Duvet
follows one principle: the right warmth,
calibrated to how you sleep — not to the calendar.
Three warmth levels.
100 % natural down. 100 % organic cotton cover.
Developed in Switzerland. Handcrafted in Germany.
To enter deep sleep, your body has to lower
its core temperature by roughly 1 °C.
The faster the drop, the deeper the recovery.
But the drop is fragile. A duvet that traps heat
forces the body to sweat. One that doesn't insulate
forces it to shiver. Either way, the energy
that should restore your body is spent on thermoregulation.
Across a third of your life, this isn't a comfort issue.
It's a recovery deficit you carry into every day.
The right duvet doesn't fight your temperature —
it moves with it. The wrong one costs you.
Night after night. Year after year.
Guter Schlaf ist keine Frage des Glücks. Er ist eine Frage der Temperatur.Wer nachts schwitzt, verschwendet Energie – der Körper reguliert statt zu regenerieren. Wer friert, schläft flach. Beides kostet, was der Schlaf eigentlich geben soll: vollständige Erholung.Drei Wärme-Varianten, präzise für unterschiedliche Körper, Schlafzimmer und Jahreszeiten entwickelt. Wähle die Decke, die zu dir passt – nicht zur Norm.
Most duvets use one chamber geometry for every season. We developed three.Summer: no-wall chambers — air flows freely. All-Year: 2 cm walls — balanced warmth that breathes. Winter: 6 cm walls — a deep warmth bed that holds body heat.Hermetically sealed. No shifting. Even warmth after many washes.
A down feather is not a passive material. It breathes.Its fine filaments absorb moisture before sweat forms and release it outward. Warmth is stored when the body needs it — and released when it becomes too much. The 100% organic cotton cover keeps the microclimate under the duvet stable. The right feeling — all night long.
– Filling: 100% down, guaranteed no live plucking
– Cover: 100% premium organic cotton with fine air channels
– Storage bag: 100% wool (natural felt)
– Certified to NOMITE® and OEKO-TEX® Standard 100
– Developed in Switzerland, manufactured in Germany
– Fill weights individually calibrated per size
– Precision craftsmanship in every seam
