A swim diaper comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core positioned in between said topsheet and said backsheet, said absorbent core having a first and second longitudinal edge and a front and rear transverse edge ; wherein the absorbent core comprises a top core wrap sheet and a back core wrap sheet and comprises between 30 and 160 gsm fluff pulp in between the top and back core wrap sheet; wherein the absorbent core is substantially free of superabsorbent polymers; wherein, seen in a longitudinal direction of the absorbent core, looking from the front transverse edge to the rear transverse edge, the absorbent core comprises subsequently a first (Z1), second (Z2), third (Z3) and fourth zone (Z4); wherein the absorbent core comprises a front part extending between the front edge and a transverse crotch line of the absorbent core , and a rear part extending between the rear edge and the transverse crotch line of the absorbent core ; wherein said first (Z1) and second zone (Z2) extend in the front part of the absorbent core and said third (Z3) and fourth zone (Z4) extend in the rear part , wherein the second (Z2) and third zone (Z3) together extend over a length corresponding with at least 40% of the length of the absorbent core ; and wherein the absorbent core is provided with one or more reinforcement zones , where the top core wrap sheet is attached to the back core wrap sheet , extending at least partially in the second (Z2) and/or third zone (Z3); wherein the one or more reinforcement zones are arranged such that for any area in the second (Z2) and/or third zone (Z3) having a width of 50% of a width of the absorbent core and a length of 40% of a length of the absorbent core , at least one reinforcement zone is at least partially located in said area. wherein the absorbent core comprises a top core wrap sheet and a back core wrap sheet and comprises between 30 and 160 gsm fluff pulp in between the top and back core wrap sheet; wherein the absorbent core is substantially free of superabsorbent polymers; wherein, seen in a longitudinal direction of the absorbent core, looking from the front transverse edge to the rear transverse edge, the absorbent core comprises subsequently a first (Z1), second (Z2), third (Z3) and fourth zone (Z4); wherein the absorbent core comprises a front part extending between the front edge and a transverse crotch line of the absorbent core , and a rear part extending between the rear edge and the transverse crotch line of the absorbent core ; wherein said first (Z1) and second zone (Z2) extend in the front part of the absorbent core and said third (Z3) and fourth zone (Z4) extend in the rear part , wherein the second (Z2) and third zone (Z3) together extend over a length corresponding with at least 40% of the length of the absorbent core ; and wherein the absorbent core is provided with one or more reinforcement zones , where the top core wrap sheet is attached to the back core wrap sheet , extending at least partially in the second (Z2) and/or third zone (Z3); wherein the one or more reinforcement zones are arranged such that for any area in the second (Z2) and/or third zone (Z3) having a width of 50% of a width of the absorbent core and a length of 40% of a length of the absorbent core , at least one reinforcement zone is at least partially located in said area. <EOS>