The recommended sleep durations, according to the National Sleep Foundation✓ for nine different age groups are as follows: Age Like the Snüz Surface Duo Cot Mattress, above, this mattress has two surfaces: the firmer baby surface and, on the other side, a softer surface for when your baby grows into a toddler. The main difference is that this mattress is a cot bed model only, which we think is a more natural fit for this type of baby-to-toddler option. It also has a waterproof cover that's removable and washable, like the Snüz - a very practical addition. Before we recommend new products, we always ask our trusted Mumsnet users, of which there are more than 7 million each month. That’s a lot of honest, impartial advice. Expert guidance

The SnüzPod bedside crib is one of the most popular baby products on the market, so we were excited to try the brand’s new Pro Adaptable mattress from its new SnüzSurface collection.

Some travel cot mattresses are designed and constructed to be foldable, which could make transportation and storage easier when not in use. In addition, manufacturers often include handy carry bags for these types. Care Instructions Hydrate with fluids - air in aeroplane cabins can be dry - staying hydrated will make everyone feel better. Secondhand mattresses are best avoided – if only because the links between passed-on mattresses and cot death can neither be confirmed nor refuted. In 2002, a BBC story said that researchers at The Royal Hospital for Children in Glasgow claimed to have found a "significant” link between having a secondhand mattress and a risk of cot death. No causation was established, but it’s worth bearing in mind. Your mattress should come with instructions on how to clean it, so read these carefully. Be especially careful not to shrink the cover, if it has one, as this may lead to it compressing the mattress, creating gaps around the outside.

A study✓ investigating cross-cultural sleep patterns and sleep problems showed that children ages birth to 36 months from predominantly-Asian countries had significantly later bedtimes, shorter total sleep times than children from predominantly-Caucasian countries.

Silver Cross is a much-loved brand but it’s branched out beyond its iconic prams and is now turning out equally iconic cot mattresses. A cot mattress protector is a very good idea, yes. If a nappy overflows in the night and wee soaks into the mattress, this can cause bacteria to develop inside. Made with an eco-friendly, recyclable polyester fibre core, which is an excellent alternative to foam.