Memory foam moulds to the shape of your body as you sleep and springs back to shape when you get up this topper has a generous 45cm depth of foam for wonderful comfort and all over support the surface of the memory foam has a unique contour cut design for improved support and increased airflow incased in a coolmax cover to keep you comfortable all night long dimensions single 3ft w90 x l190cm 35 x 75 approxndouble 4ft 6in w137 x l190cm 54 x 75 approxnking size 5ft w150 x l20