Absorbent insert

A disposable absorbent insert for a reusable outer shell, the insert having an extension in the longitudinal direction and the transversal direction, longitudinal and transversal side edges and having a front portion, a back portion and a crotch portion located between the front and the back portions, the insert comprising:

• an absorbent core having longitudinal and transversal side edges and being sandwiched between a liquid-permeable and user facing topsheet and a liquid-impermeable and garment facing backsheet, and
• wherein the absorbent core comprises:
• an absorbent component enclosed by a core cover comprising an upper and a lower side,
• the insert comprising a first longitudinal extending standing gather along a first longitudinal side edge of the insert and a second longitudinal extending standing gather along a second longitudinal side edge of the insert,
• wherein the topsheet extends transversely outside the first longitudinal extending standing gather to form a first side leakage flap and the topsheet extends transversely outside the second longitudinal extending standing gather to form a second side leakage flap, and the first and second side leakage flaps lack elastics.