Still worried about the quality of your baby's sleep? Serweet baby mattress for your worries! Two-stage development design, high-density solid foam and slightly soft gel memory foam double-sided care, grow with the baby. Breathable and comfortable, the knitted cover, cold gel and perforated foam promote air circulation and resist hot and humid. It is safe and hypoallergenic, away from harmful chemicals. Easy to install, compressed in a portable box, open and leave for 72 hours. Cleaning is also very easy, the bed covers can be removed, the core can be washed, away from dust mite allergens. Dimensions: 52"L*27.5"W*5.5"H Weight: 12.46LB