Reducing exposure to house dust mites improves the chances of your baby avoiding asthma and hay fever. The likelihood of acquiring a house dust mite allergy is linked to exposure to the house dust mite itself. A German study through the first three years of life found a direct link between exposure to the two main house dust mite allergens and the development of asthma or hay fever.
Just 4% of Houses are Free of Dust Mite Allergens, a Significant Factor in Risk of Developing Asthma
Buying the right mattress for your baby is actually much more important than deciding which cot you are going for. It is the mattress surface that your baby will lie on for more than half their day that should take priority rather than the design and style of the cot or crib. I would always recommend that you spend more money on a good healthy baby mattress rather than the cot.