A Good Night's Sleep, All Round. For the first two years of their life, your baby will sleep for around 13 months. That's a lot of sleep, but it's vital for developing their cognitive skills and nervous system. So, it's fair to say that sleep is essential, especially as it gives you chance to catch up on some much-needed rest as well. A good night's sleep starts with a good quality mattress. Mamas & Papas have a range of supportive mattresses, all tested to the highest U.K. standards, with a variety of cores and helpful properties that ensure your baby sleeps well from day one. So you can too. As your little one grows, they'll need a mattress that grows with them. The Premium Pocket Spring Cotbed Mattress features a dual core pocket spring design with one side suitable for a baby, and the other perfect for a growing toddler. Treated both sides with Purotex Technology that protects against dust mites and allergens, this anti-allergy mattress is perfect if your little one is prone to allergies. Suitable with an