It is very important to use a safe mattress. Make sure your mattress is the right size for the cot. There should be no more than a 2cm gap between the mattress and the cot sides. Your baby/toddlers’ mattress should be firm, clean and in good condition. A soft or ill- fitted mattress can increase the risk of SIDS. It is also important to remember that your mattress should be flat, never tilt or elevate your mattress.