Mattress Medium Twin Bed material description Comfortable type Thickness: 23cm Hardness: Moderate (front) Moderate (back) Thai latex + Independent spring 1.3D German breathable fabric 2.5cm natural Thai latex 3.Highly elastic foam 4.Shaping nylon fabric 5.Hard PK cotton 6.Independent spring bag 7.Hard PK cotton 8.3D German breathable fabric Feature: Applicable for adults who like soft mattress or style of five-star hotels, not suitable for children, the elderly and adults with poor lumbar spine.