聚氨酯慢回彈（VF）系列慢回彈海綿也稱之為記憶海綿。慢回彈產品可按人體工程學設計造型。根據人體頭部、頸部睡眠時自然舒展狀態，提供吻合頭頸曲線的最均勻的承托力，使頭頸部得到完全的放松和休息，消除因不正確的睡姿而產生的疲勞及酸痛。PolyurethaneviscoelasticFoam(VF)seriesIt sakindofslowresiliencesponge,alsocalledmemorysponge.Theproductcanbedesignedandmoldedonthebasisofergonomics,i.e.,themostuniformloadbearingcapacityisprovidedtodove-tailwiththehead-neckcurvebasedonthenaturaloutspreadstatusoftheheadandneckwheninsleep,soastoenabletheheadandnecktorelaxandatease,thuseliminatingthefatigueandachingpainresultingfromincorrectlyingposture.