SIENNA 4000 Bamboo Wool Cooling Hybrid Mattress - Comfort UK

SLEEP HARVESTER LTD

£449

SIENNA is a 33 cm deep Pressure Relief Spine Support gravity-defying ergonomic mattress ingeniously designed with 11 high performance comfort and support layers. A perfect combination of naturally cool Bamboo fabric , heat wicking pure wool and 30x breathable , innovative Sleep Resonance Foam ® creates a soothing sleeping surface for your reinvigorating sleep. Advanced 4000 ErgoTurn® micro-pocket springs and Airpulse medical memory® add more comfort, minimise pressure points and maximise posture support to get you off to sleep faster on this health hypoallergenic mattress - your blissful sanct

SLEEP HARVESTER LTD's own words, read from their page.

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Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.

UK company
Registered at Companies House as SLEEP HARVESTER LTD, number 11560976. Checked 2026-08-29.
Means the business is a British legal entity, not a British-sounding name owned elsewhere. It says nothing about where anything is made.
UK operations
Not yet checked.
Means people employed here, or premises they actually work from. We keep this separate from the company badge because a registered office can be an accountant's spare room, and a company can be registered in Britain while everything it does happens somewhere else. Where we have not looked, we say so rather than assuming.
British-owned
Not established. Many companies file a statement rather than naming a controlling shareholder.
Read from the register of people with significant control, following the chain of holding companies. It does not gate anything: a firm can be made here and owned elsewhere, and that is worth telling you rather than hiding.
Where it is made
The maker doesn't say, so neither do we.
This is about the individual product, not the company. A British firm can sell things made abroad, which is normal and not a criticism. We would rather tell you which is which than average them into a score.