1. An absorbent article (1) having a longitudinal direction and a transverse direction, side edges (8, 9) extending in the longitudinal direction, and end edges (11, 12) extending in the transverse direction, and containing a fluid permeable top sheet (2) a fluid-impervious lower sheet (4) and an absorbent core (6) sandwiched between said upper sheet (2) and said lower sheet (4), said absorbent core (6) comprising a first absorbent layer (22 ) having an opening (25) extending through n his； characterized in that between said first absorbent layer (22) and said bottom sheet (4), a structure (24) controlling the fluid flow is made, said structure (24) controlling the fluid flow being a layered structure containing non-perforated fibrous a polymer layer (31) and a first perforated polymer layer (32), wherein the polymers in the first perforated polymer layer are selected from polyolefins, polyesters, polyamides and mixtures and combinations thereof, said first perforated the polymer layer (32) has a bulk of from 50 to 150 g / m. 2. An absorbent product according to claim 1, in which the first perforated polymer layer (32) has a bulk of from 60 to 100 g / m. An absorbent article according to claim 1 or 2, wherein said first perforated polymer layer (32) is a non-woven material, a film or film / non-woven laminate, said first perforated polymer layer (32) preferably being a non-woven material. An absorbent product according to claim 1 or 2, wherein said first perforation1. Впитывающее изделие (1), имеющее продольное направление и поперечное направление, боковые края (8, 9), продолжающиеся в продольном направлении, и торцевые края (11, 12), продолжающиеся в поперечном направлении, и содержащее проницаемый для текучей среды верхний лист (2), не проницаемый для текучей среды нижний лист (4) и впитывающую сердцевину (6), заключенную между упомянутым верхним листом (2) и упомянутым нижним листом (4), причем упомянутая впитывающая сердцевина (6) содержит первый впитывающий сло
