It's better to buy a baby cot with mattress, bedding, and fitted sheets together because it provides a complete sleep solution for the baby. Our mattresses, bedding, and sheets are designed to be compatible with our baby cot for a safe and comfortable sleep environment. Additionally, buying these items together can often be more convenient and cost-effective than purchasing each item separately. This way, you can ensure that your baby has a comfortable, safe, and hygienic place to sleep.