FAQ´s

For crawling insects – and only for them – contact with the sheet is like touching a burning hotplate, because the bedbugs-free sheet contains a repellent substance. Since the active substance is incorporated into the textile fibre itself during the production process, the effect is guaranteed to last practically a lifetime.

How does Permethrin work?

The repellent permethrin is chemically related to the naturally-occurring compound pyrethrum, one of the countless substances used by plants to stop their blossom from being eaten by insects. Permethrin therefore “imitates” a natural substance and is a member of the large family of pyrethroids, all of which have a strong repellent effect against arthropods.

Of all these active substances, permethrin is by far the one with the lowest evaporation rate and solubility, the lowest toxicity for mammals (apart from cats) and it is the longest-lasting. Permethrin when applied topically (i.e. when it is absorbed through the body surface) is more than 4 000 times more toxic to bedbugs, ticks, fleas, mosquitoes, harvest-bugs and other anthropods than to almost all mammals when ingested orally.

What are arthropods?

Arthropods have a jointed body and limbs and usually a hard shell or exoskeleton to which the muscles are attached on the inside. More than 75% of creatures fall into this category, the majority of them insects. Other arthropods are ticks, mites, spiders, scorpions, centipedes and crabs. All of these lay eggs, from which the adult creatures develop after going through several larval and molting stages.

How does the anti bed bugs sheet used?

It is the ideal travel companion for business trips, trekking tours, pilgrimages or major events lasting several days. Spread the sheet on the mattress before lying down, making sure that the sheet is hanging over the mattress on all sides. For maximum protection, ensure that your whole body is on the sheet.

When using the hotel bedcover ensure that it is placed completely ON TOP of the sheet. The sheet is only useful if there are no alternative routes that the bedbugs can use to climb into the bed.

The sheet is not a substitute for sustained pest control efforts but is a useful accompanying measure to provide immediate protection in the case of a severe infestation.

If there is lasting contact the insects can develop resistance after 12 generations. We therefore strongly recommend that you do not use the sheet on a permanent basis. It requires professional expertise and a great deal of experience in order to combat bedbug infestations.

What will I be protected against?

The sheet offers protection against bedbugs, ticks, harvest-bugs, fleas, ants and other crawling insects and arthropods.
If you roll yourself in the sheet or use it as a cover or screen it can also provide protection against flying insects, such as mosquitoes, gnats and flies.

Care instructions?

The textile mix (50 % cotton, 50 % polyester) is simple to care for and does not crease easily.

Careful handling of this sheet with its invisible protection will lengthen its useful life. We recommend washing with a liquid detergent up to a temperature of 60°C. The sheet can be tumble-dried. Dry cleaning is not recommended.

Be careful when ironing! All the features of this sheet have been designed for maximum functionality. The fabric does not crease easily and does not need ironing – on the contrary, ironing will reduce the duration of its repellent effect. If you nonetheless feel you need to iron it, be sure to place a cloth between the iron and the sheet in order to help protect its repellent function.

The repellent effect is completely odourless and invisible.

When the sheet is delivered you may wonder about the smell or the fact that it feels slightly sticky to the touch. This is just the finishing agent. If necessary you can wash it before use. It is up to you, bearing in mind that each wash has some effect on the material and its effectiveness.

To avoid confusing the sheet with ordinary sheets and make it easier to find, we suggest storing it separately from your ordinary bedlinen, for example with your suitcase, sleeping bag, camping gear or toilet bag, or in the car.

How long does the protective effect last?

If well cared for, the protective effect lasts as long as the material itself.

Can the sheet be used for vulnerable individuals (e.g. pregnant women, nursing mothers, babies and toddlers, the elderly, convalescent patients and people prone to allergies or hypersensitivity)?

Precisely the eldery and hypersensitive individuals or people with weakened immune systems need protection from insect and tick bites that could make them ill. Ticks, for example, are particularly prevalent in high grass and under park benches. The repellent poses no known risks for pregnant women, nursing mothers and babies (even when applied in the form of an ointment). Allergies against all chemicals – whether synthetic or naturally occuring – are possible.

Warning to allergy sufferers! We recommend that you test the sheet by lying on it well before you plan to use it. In almost 30 years we have not encountered a single case of an allergic reaction to permethrin. Neither have we been able to find a single reported case of permethrin allergy in our extensive research on the subject. However warnings against this substance are posted on allergy forums on the Internet.

Why is the sheet white?

The colour of the sheet is an extra source of protection. If in spite of everything a blood-sucking insect does find its way onto the sheet, it can easily be seen against the white background and removed.

Can I dye the sheet?

Dyeing involves a series of chemical processes that may reduce or even prematurely destroy the protective effect of the sheet. It should therefore not be dyed.

Why is the sheet hemmed only at the short ends and left unhemmed on the sides?

The main purpose of the sheet is to deter insects. That function, in the opinion of our expert entomologist, takes absolute precedence over esthetic considerations. With a view to sustainability we also wish to reduce all superfluous features. We have quite deliberately decided not to hem the sides for a number of reasons:

An optimum width would in our view be 180 cm. For the moment there are no suppliers of that width in this patented quality. That being the case it is important to use the available 160 cm of fabric to the full.

Most of our customers need two sheets when travelling as a couple. The overlapping seams of the two sheets would be uncomfortable.
For use in a double bed many customers sew two sheets together, which would mean unpicking the side hems.
The selvage edges on the sides do not fray when left unhemmed.

If you expressly wish you can order a sheet hemmed on all sides. However we recommend using the full width of the sheet and hemming the two ends only.

Tip: To avoid uncomfortable seams we recommend sewing the two overlapping sheets together to make a flat, as opposed to a butt seam.

Are the sheets available in a thinner fabric?

Every gram counts when you are packing. The thickness, density and composition of the material used to make our feather-light anti-bedbug sheet are precisely geared to its function. Thickness has been precisely calculated to allow the fabric to take up exactly the right amount of repellent without making the sheet unnecessarily heavy. The sheet is made of an easy-to-care-for and resistent cotton mix. The synthetic fibres make it lightweight, tough and non-iron. The cotton makes it absorbent and soft to the touch.

Are the sheets available in other materials, for example pure cotton?

On request, for large orders. Please contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

For which animals is the sheet not recommended?

Cats have a different metabolism to other mammals. The active substance is harmful to them as well as to reptiles and aquatic animals.

Are there sizes other than 160x240 cm (63 x 94,5 inches)?

Special sizes may be produced on request. Please consult This e-mail address is being protected from spambots. You need JavaScript enabled to view it directly about price and availability.

What about protecting the environment?

The product is environment-friendly in terms of the textile production process, the use of the product as a protective sheet and the long-lasting nature of its repellent effect:

During the production process all solvents and residues are recuperated and recycled so that the waste water is free of contaminants. Since permethrin, like all pyrethroids, is highly toxic for aquatic animals, this makes the process particularly environment-friendly.
When the sheet is being used all the active substance stays in the fabric.
Given the long-lasting repellent effect, there is no need for the user to re-treati the sheet, with the risks that this entails.

Are there only sheets – or are other products also available in the same fabric?

On request you can order sleeping bags, clothing for people and animals, sports and leisure-wear, picnic rugs and dog blankets. Please contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it directly.

How much protection do I get in the case of a severe infestation?

Sniff the air in the room you intend to spend the night in. A severe bedbug infestation can often be detected as soon as you open the door due to its unpleasant sickly-sweet smell. Under such conditions the sheet is only effective up to a point: some 2.5 % of the bedbugs are likely to resist the repellent effect. While in the case of ten bedbugs that means that practically none will get through, in the case of 100 there will be two or three and in the case of 1 000 there will something like 25 particularly hungry specimens able to get to your body despite the sheet!
Avoid sleeping in strongly infested rooms whenever possible.

We recommend paying particular attention to rooms that have remained unused for some considerable time before your visit, during off-peak periods in tourist areas, for example, or in emergency accommodation. Bedbugs suck blood on average once a week and can go for months without eating, particularly in cool temperature conditions. In such rooms there is therefore a higher risk of encountering hungry bedbugs that are able to overcome the barrier for a time. Whether they are still able to bite properly under such conditions is currently being investigated.

The white colour of the sheet offers you an additional safety guarantee: any insect that is able to find its way into your bed will be easily visible.

How do I check that the repellent effect still works after a long period of use?

Place a few ticks, bedbugs, ants, flies or mosquitoes on the sheet and keep them there for a few minutes, for example using a glass. Afterwards observe their behaviour for a while.

You will easily be able to see whether there is any resistance to the repellent, for example on the part of bedbugs.

Practical tip for the hypersensitive

Although our customers theoretically understand that the sheet is safe to use, we nonetheless hear occasional reports of a vague sensation of discomfort. Fear can also make you ill.

If you have the slightest worry, we recommend placing a towel between the sheet and the body, leaving about 30 cm of uncovered sheet all around you in order to completely maintain the protective function.