As an experienced mattress reviewer that has been in this industry a while, I understand the importance of finding the right mattress for your child. A comfortable and supportive mattress not only helps your little one get a good night\u0027s sleep but also promotes healthy development while transitioning them to a full sized bed. When it comes to toddler mattresses, there are several key characteristics to look for. First and foremost, safety is paramount and a way to ensure this is to find a product that will be firm enough to support your child\u0027s growing body but not so firm that it is uncomfortable. You should also consider looking for a mattress that meets safety standards and regulations, such as the Consumer Product Safety Commission\u0027s (CPSC) guidelines. Fortunately in the UK, we have good safety regulations and standards that make much of this unnecessary. Another important factor to consider is size. Toddler mattresses are typically smaller than most standard mattresses, although depending on the age many small single and single mattresses may be suitable and are the perfect size for young children. The mattress should fit snugly in the toddler bed, with no gaps or spaces that could be a safety hazard should they fall into them while they sleep. In addition to safety and size, comfort is also crucial and finding a mattress that is made from high-quality materials, such as foam or innerspring coils will go a considerable way to ensuring satisfaction. A good toddler mattress should be breathable, allowing for air circulation to keep your child cool and comfortable throughout the night with the caveat that beathability can be somewhat compromised with wipe-clean and water repellent materials found in many toddler-designed products. Finally, and more on that hygiene we touched on above, consider the mattress\u0027s durability and ease of cleaning. Toddler mattresses can take a beating, so you\u0027ll want one that is built to last. Look for a mattress with a sturdy construction and a removable, washable cover for easy cleaning.