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Is it true that heat is likely to accumulate under featherbeds?
Down-and-feather-filled duvets are always capable to regulate the climate in bed. The idea of heat accumulation under a down–and-feather-filled duvet might trace back to the “bulging balloon bed” shown on the pictures in Wilhelm Busch´s classic children´s stories. However, scientific research on the subject “micro climate in bed“ revealed that high temperatures do not occur under featherbeds, even less under a down-filled duvet which is light by nature.
Further information at :
Duvets sewn in diamond patterns or square boxes etc. – what are the differences ?
Only the traditional “bag duvet” is not stitched at all.
- Bag duvet: The so-called bag duvet consists just of the filling and the fabric shell without any special construction. It is not stitched-through at all and does not have any compartments. So the filling is not evenly spread over the area of the duvet. The traditional bag duvet is still available in the market though it has become less important in comparison with stitched-through duvets.
Initially, a small continental bag duvet was called “plumeau“ (size about 130 x 130 cm). Sometimes the term is also used for the traditional larger bag duvets without any compartments or stitched-through patterns.
- Duvet with diamond pattern: Small discontinuous baffle walls stitched alternately in crosswise and lengthwise ensure that the filling is fixed.
The capability of the down / feather filling to move inside the ticking shell is restrained. It is impossible for the filling to get out of place. The filling within the duvet can be spread according to desire. Since the interior baffle walls do not form enclosed compartments, they must no be filled one by one.
- Stitched-through duvet sewn in diamond pattern: The shell of the duvet is sewn in numerous small diamond patterns ensuring that the filling is permanently fixed. In this case, the upper and the lower sides of the ticking are sewn on top of one another – i.e. without any baffle walls.
Example of a stitched-through duvet.
Duvet with interior baffle walls: This type of duvet is provided with continuous baffle walls which are stitched in diamond pattern between the upper and the lower sides of the ticking to make sure that the filling is evenly spread over the area of the duvet and the height is even at all places as requested. So-called cold zones cannot occur.Single compartments are constituted in various numbers. The duvet may for instance be composed of 3 x 4 or 4 x 6 boxes. The filling is divided in single compartments and permanently fixed that way. Each compartment is filled individually.The height of the interior baffle walls may range from to 2 cm to 15 cm in order to obtain the requested degree of thermal insulation (low baffle walls for a summer duvet and high ones for a winter duvet).
Examples of duvets with interior baffle walls.
- All-seasons duvet: This type of duvet consists of two single duvets with different filling weights: The lighter one is suitable for use in summer and the other duvet offers a higher degree of thermal insulation suitable for spring or autumn. If the two single duvets fit together (for instance with buttons, zip fasteners or tape), a duvet will be created which offers excellent thermal insulation, that is to say a winter duvet.
Example of a all-seasons duvet.
Down duvet and feather duvet – what are the differences?
Why do down-and-feather-filled duvets provide such a favourable micro climate?
Why are duvets filled with eiderduck down so expensive?
They provide excellent fill power figures which almost double the fill power values of top-quality goose down. One kilogramme contains about 500 000 single eiderdown but only 300 000 goose down. Eiderduck down are even more delicate and lighter than goose or duck down and have a natural brownish colour. They have scarcity value and are difficult to process, respectively, which leads to stiff prices.
Eiderducks are protected birds since they are a critically endangered bird species and cannot be bred.
Eiderduck down have excellent heat-insulating capacities. The barbules are larger than goose and duck down and have countless ramifications. In spite of their size they are even lighter and more delicate than usual goose or duck down. The barbules of eiderduck down are twinned. Their barbs are frizzed and form prongs at their ends which make the down stick together. If they did not form a cohesive pad, the wind would blow the single down out of the nest.
Further information on the internet:
What is the right size of a duvet?
Which duvet and pillow should I buy?
- the filling material
Two main types of fillings are available. Natural fillings such as down and feathers, wool fibres (virgin wool, camel hair, cashmere), cotton and wild silk – and synthetic fibres, e. g. micro fibres, chemical fibres such as hollow fibres and cellulosic fibres are on sale.
- the type / shape
Since people using duvets have different individual needs and purposes (summer and winter duvets) duvets have been developed in a wide variety. Some are made with interior baffle walls. Duvets without interior baffle walls are stitched-through. They are available in a number of different make-ups and appearance. They can be sewn in box-squares, channels or a number of different patterns – like ring-stitch, diamond or diagonal patterns, etc. so that everyone can find the duvet that meets the requirements.
What are the advantages of down- and feather-filled duvets?
When buying duvets and pillows the individual needs while asleep are decisive criteria. Down-and feather-filled bedding products can be “customised”, i. e. they can be manufactured entirely according to the individual needs of the customer. There is a wide variety of duvet sizes, filling weights and stitching patterns so that the duvet can be specially tailored according to individual needs.
In this regard, the individual need for warmth and the requirements for the duvet comfort play a role (weight, drapeabililty).
For instance, a down-filled duvet for the winter with interior baffle walls is ideal for people who feel cold easily at night or want to sleep at low temperatures in a bedroom with an open window. Stitched-through, light down duvets are recommended for use in summer.
Down offer ideal sleeping comfort. They are lightweight and assure excellent climate regulation. A pleasant warmth quickly spreads during the sleep and the absorbed perspiration is being eliminated.
- low weight
Waterfowl feathers (goose and duck) have high fill power values, which means the capacity to trap large quantities of air (bulking power). The filling power of down is even better.
Down-filled duvets contain down imbedding large quantities of air pockets which act as an insulating layer. The percentage of air reduces the weight of the duvet in proportion to its volume. Hence feather- and in particular down-filled duvets keep the body warm and comfortable during the sleep and are very light at the same time.
- Excellent thermal insulation capacity
The insulating effect of a duvet crucially depends on
- the filling material (for instance down and feathers)
The grade of thermal insulation may differ depending on the filling quality and the proportion of down and feathers. The higher the down percentage the better the fill power values and thus the thermal insulation capacity of the duvet.
For this reason, many consumers prefer in particular duvets filled with a blend of 90 % down and 10 % feathers.
Feather and down blends are mainly used for pillows, since feathers help to support the head resting on the pillow, but more and more people now prefer a pillow with a soft down filling.
- the weight of the filling (indicated in grams)
The weight of a filling (indicated in grams) may differ depending on the individual requirements. Depending on the filling weight, the duvets are manufactured for use in summer or in winter. Duvets are available in a wide variety of stitching patterns and constructions to meet the customers´ very special requirements.
The filling of a single size summer duvet weighs about 200 grams, and the filling of a very warm single size duvet with interior baffle walls with various compartments weighs approximately 800 - 1000 grams (size 135 x 200 cm).
- the stitching construction (for instance with or without interior baffle walls).
Basically, the construction of a duvet is determined by the stitching pattern. Duvets are available in a wide variety, the traditional bag duvet or ballon duvet without any stitching, a duvet with various compartments and interior baffle walls. Summer duvets contain cold zones which have been created on purpose, winter duvets are supposed to have a high insulating factor.
Example of a special stitching. Source: Brinkhaus, Warendorf.
- bulking capacity, that is to say the capacity of the filling to trap air. The air-filled pockets make out the insulating properties of the duvet (fill power). Down provide the best fill power values.
The term “drapeability“ describes the capacity of the duvet to adapt to the shape of the sleeper and his or her movements during the sleep. Since everybody changes the position in bed several times during the sleep, it is crucial that the duvet readily adapts to each position of the body. Channels formed during the sleep admitting cold air to get into the bed might affect restful sleep and are perceived by the sleeper as being uncomfortable.
- Favourable micro climate
Down-and-feather-filled bedding duvets and pillows are very capable of absorbing and transmitting the body's humidity outside the bed even in persons with strong perspiration.
- How does the KIS®-system help to choose the ideal down duvet?
- Why do down-and feather-filled duvets provide such a favourable micro climate?
- What does the term “warmth without weight“ mean?
- What blends of down and feathers are most suitable?
- What are the most useful colours for down and feather blends for pillows?
- What does the term filling weight mean?
- Duvets sewn in diamond patterns or box squares etc. – what are the differences?
- What does the term "fill power" mean?
Things to look for when buying a duvet!
- It must offer ideal heat-insulating capacities to protect the body from cold during the sleep but should not make you feel hot.
- it shall ensure that the perspiration absorbed during the sleep is being eliminated (optimum transport of humidity),
- it shall keep the body warm with as little weight as possible,
- it shall ensure best drapeability and not create cold zones,
- it shall comply with the labelled size. A duvet or pillow should fit into the quilt cover,
- it shall have suitable heat-insulating properties in proportion to its weight (warmth without weight),
- it must have been made properly – this applies for instance to the seams,
- it should be suited for persons suffering from an allergy to house –dust –mites.
In particular the the brands DOWNPASS, TRAUMPASS and NOMITE help you to find your ideal duvet.