Features: 1.Refined material including far infrared fiber, natural ramie, pure cotton and HDPE. 2.12-22pcs of 1350gauss magnetic strips to ensure permanent magnetic therapy while sleeping on it. 3.Single size of 95x190cm (95x200cm) and double size of 150x190cm(150x200cm) are available and accept special size, too. 4.Can be used with other mattress and separately. 5.Proper configuration according to body curve to protect spine and promote sleeping. 6.Special color and design are also acceptable.