聚氨酯慢回弹（VF）系列慢回弹海绵也称之为记忆海绵。慢回弹产品可按人体工程学设计造型。根据人体头部、颈部睡眠时自然舒展状态，提供吻合头颈曲线的最均匀的承托力，使头颈部得到完全的放松和休息，消除因不正确的睡姿而产生的疲劳及酸痛。PolyurethaneviscoelasticFoam(VF)seriesIt sakindofslowresiliencesponge,alsocalledmemorysponge.Theproductcanbedesignedandmoldedonthebasisofergonomics,i.e.,themostuniformloadbearingcapacityisprovidedtodove-tailwiththehead-neckcurvebasedonthenaturaloutspreadstatusoftheheadandneckwheninsleep,soastoenabletheheadandnecktorelaxandatease,thuseliminatingthefatigueandachingpainresultingfromincorrectlyingposture.