Damp areas and little sunlight cause mold

It is common fungus found in:

Damp areas:  musty damp areas like attics, basements and bathrooms. 

Dark areas: These areas are mostly dark and moist 

Little sunlight: with very little if any sunlight 

Stagnate air: with typically very stagnate air movement. 

Trees & plants: Trees and plants, and 

yes even fibers and foams like those found in mattresses can be common places that support mold growth.  

Mold spores can become airborne and move through the air seeking out wet areas to multiply in not only your home but the bed you sleep in.

http://www.chem-tox.com/guest/guestbook.html

How To Prevent Mold In A Mattress

we need to start by keeping the mattress dry, it is the major key to preventing mold proliferation in your bed.

 We believe it all starts with good breathable bedding and good mattress protection.

Good waterproof mattress pads not only keep mattresses dry but keep moisture away from these giant sponges we call mattresses. 

Other ways to avoid mold in mattresses include not laying wet towels on the bed after showering. Don’t go to bed with a wet head, thoroughly dry your body and hair after a bath . 

If you have a bathroom off your bedroom make sure your bathroom door is kept closed and that it has a strong ventilation fan that can effectively pull moisture out of the bathroom keeping moisture and high humidity out of the bedroom. 

We all lose a lot of liquid when we sleep through the body’s natural cooling process called perspiration while we might not be able to control sweating,

we can occasionally introduce our mattresses to protection such as the sun, a natural killer of mold spores and a great way to freshen up a mattress.

https://www.stlbeds.com/how-to-prevent-mold-in-a-mattress/

Latex allergy - better not to use latex mattress

Latex allergy is a medical term encompassing a range of allergic reactions to the proteins present in natural rubber latex.^[1]

The immune system of some susceptible individuals produces antibodies that react immunologically with these antigenic proteins.^[2]

As many items contain or are made from natural rubber, including shoe soles, elastic bands, rubber gloves, condoms, baby-bottle nipples, and balloons, there are many possible routes of exposure that may trigger a reaction.

People with latex allergies may also have or develop allergic reactions to some fruits, such as bananas.^[3]

Latex-fruit syndrome[edit]

People who have latex allergy may also have or develop an allergic response to some plants and/or products of these plants such as fruits. This is known as the latex-fruit syndrome.^[12] Fruits (and seeds) involved in this syndrome include banana, pineapple, avocado, chestnut, kiwi fruit, mango, passionfruit, fig, strawberry and soy. Some but not all of these fruits contain a form of latex. Hevein-like protein domains^[13] are a possible cause for allergen cross-reactivity between latex and banana^[14] or fruits in general.^[15]

Risk Factors

• People who have had multiple surgical procedures, especially in childhood.^[9]

Epidemiology[edit]

Estimates of latex sensitivity in the general population range from 0.8% to 8.2%.^[27]

https://en.wikipedia.org/wiki/Latex_allergy