Thermo Gold

When it comes to performance, there is much to be said for synthetic Hollowfibre. Completely hypoallergenic, suitable for regular and easy washing and drying, and with a fantastic thermal performance thanks to its air trapping ability (within the fibre), it is a great choice as duvet fill. The finest quality hollowfibres also create loft and 'cuddliness' that is a feel that many people enjoy in a duvet. Our question at RESTED was how could we enhance a fibre filled duvet to create an advancement beyond the status quo both in terms of performance, and luxury. Our answer: to combine hollowfibre with Lyocell, the naturally derived high performance fibre extracted from trees, that when used as a filling drastically increases the moisture absorption and dissipation of the duvet as whole, and adds an enhanced internal feel of drape and encasement thanks to the smoothness of the Lyocell fibre. The 100% Lyocell Gold outer cover is completely unique and provides an external feeling of majestic silken luxury. The end result is a performance synthetic duvet, supplemented by nature and technology, that is the perfect solution for those that require a complete hypoallergenic solution and wish to indulge themselves with a quilt of true luxury at the same time.


Sleeping with 'Thermo Gold'

As the name would suggest, the Thermo Gold is a strong insulator. We do not tog rate our duvets, but it is broadly equivalent to a 14 tog rated duvet. It is therefore suitable for winter months and colder environments. Not all hollowfibres are born equal, and we utilise 'quadfil' that has four microscopic holes in the fibre to reduce weight and increase its air trapping ability for increased warmth. We do not recommend the duvet for summer use or fully temperature controlled environments. The Thermo Gold offers loft, cuddliness, and coziness. The Lyocell Gold outer fabric is sublime, a shimmering silky finish moves freely and silently within your duvet cover. If your requirement is for a performance 'winter' duvet and you wish to benefit from the hyopallergenic and regular washing advantages of a synthetic, the Thermo Gold is the correct choice.

The detail

Filling: 25% Lyocell Fibres
75% Polyester Quadfill Hollowfibre
Outer Casing: 100 % Lyocell Gold
Washable at 60 Degrees and machine dryable.
Made in the European Union
All products are Oeko Tex 100 Certified
Available in Single, King Size, and Super King. Alternative standard or bespoke sizings available on request.

hollow fibre

Synthetic hollow fibres are excellent insulators. Designed to trap warm air within their core, they are soft, flexible fibres that deliver the added benefit of being easily washable, and therefore hygienic.
Not all hollow fibres are created equal, and there are substantial differences in the feel and performance depending on quality. Further innovations such as additional holes to the fibre itself can improve airflow, and therefore the ability to trap air. We use the highest quality hollowfibres available to ensure that both performance and luxury are perfectly combined within our quilts. Hollowfibre is a great choice for those that wish for a performance duvet that it is truly hypoallergenic, and can be regularly washed.


There is a lot of terminology banded around regarding the 'allergen' performance of mattresses. What we know is this: dust mites like to live in warm dark places, in moisture filled, closed environments. Latex mattresses afford no such opportunity, and neither do truly ventilated mattresses. Hypo-allergenic means 'less allergen likely than others', which is the truth of the matter and why we use that statement for mattresses to which it applies. In addition to a materials specific properties and the ventilation of mattresses to reduce allergens, most of our mattresses also have removable washable covers, which is a significant step in terms of being able to regularly wash away any dust, skin cells or allergens that are either airborne or may accumulate through your use of the bed.


Lyocell is a botanic fibre derived from tree pulp. We use it because it has 50% more moisture absorption than cotton. It is moisture and humidity that are the principle factors in temperature control, hence Lyocell takes moisture away from you keeping you both dry and cool. In its finest forms, Lyocell is produced with a truly silken feel. This is because under a microscope, Lyocell fibres are completely smooth, unlike Cotton. It has a luxurious, beautiful, smooth finish that is kind to your skin, and yet is also completely washable. Our unique 100% Lyocell Gold quilt covers are a true pleasure with advanced performance.

winter warmth

Sleep Engineering doesn't have to be overly technical. When considering our quilt ranges, standard UK 'tog' measures are largely inappopriate as most of our quilts are temperature regulating and therefore can not be classified with 'tog'. Our quilts react to you and your body temperature. So we try and keep things simple. Summer soft means that the quilt is lightweight and suitable for those that sleep in consistent temperature environments year round (i.e you use the heating in the winter). Our 'winter warmth' ranges are heavier, warmer, and suitable for the coldest months, and anyone who would naturally say that they require a high level of warmth from their quilt. In practice, the choise is easy and self evident, particulary in person at the Rested Experience.

Welcome to RESTED

Join our world of the greatest global sleep brands. Providing better sleep, long term back care and beautiful bedroom environments. Stay up to date with our latest special offers, new products and sleep science