An anti-dust mite covers has to completely shut house dust mite allergens in, in order to avoid that your mattress throws out these allergens in the air, everytime you seat on your mattress.

To be efficient, a dust mite proof cover has consequently to completely enclose the mattress and to be closed with a zip fasterner.

You absolutely need to forget covers that are attached to the mattress, only thanks to elastics and that don't enclose the mattress. Indeed, they allow an easy access for dust mites to the mattress, because of the big opening at the back of the mattress.

ProtecSom dust mite proof covers totally enclose mattresses, pillows and duvets, and, they are closed with a zip fastener. A large flap is added under the zip fastener to reinforce the proofness to dust mites.