Buying a cot for your baby? At IKEA, we have developed a range of mattresses designed to work together with our cots, so it’s easy to get one that has a snug and safe fit. All are made to be firm enough to support the needs of growing bodies, and we only use safe, durable materials free from harmful chemicals. The covers are well-ventilated, and most are removable and machine-washable, so you can rest easy knowing your baby is comfortable while they sleep.