An absorbent article, the absorbent article selected from a diaper or pant, comprising: a chassis comprising a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent core comprising absorbent material selected from the group consisting of cellulose fibers and superabsorbent polymers, said absorbent core positioned between said topsheet and backsheet, and comprising a longitudinal axis (y) extending along a length of said chassis and a transverse axis being substantially perpendicular to the longitudinal axis and extending along a width of said chassis, wherein said length extends along the longest dimension of said chassis; and at least one elastically elongatable panel joined to the chassis, wherein the elastically elongatable panel comprises: a. at least one cover layer (13, 13'); and b. an elastic material selected from the group consisting of an elastomeric film, and a plurality of elastic strands; the elastic material attached to the cover layer (13, 13'), wherein said least one cover layer (13, 13') and elastic material are joined by mechanical bonding, at a plurality of discrete bonding elements and wherein each said panel comprises a plurality of wrinkles having peaks and troughs formed on at least one of said cover layer (13, 13'), wherein said panel comprises an average of no more than two, preferably no more than one, wrinkles between two consecutive discrete bonding elements along a panel length extending substantially parallel to the transverse axis, and characterised in that said panel comprises a wrinkle distribution of at least 1.1 wrinkles/mm, according to the method herein; and wherein a first distance between neighbouring discrete bonding elements along an axis substantially parallel to the panel length is less than a second distance between neighbouring discrete bonding elements along an axis substantially perpendicular to the panel length. a chassis comprising a liquid permeable topsheet, a liquid impermeable backsheet, and an absorbent core comprising absorbent material selected from the group consisting of cellulose fibers and superabsorbent polymers, said absorbent core positioned between said topsheet and backsheet, and comprising a longitudinal axis (y) extending along a length of said chassis and a transverse axis being substantially perpendicular to the longitudinal axis and extending along a width of said chassis, wherein said length extends along the longest dimension of said chassis; and at least one elastically elongatable panel joined to the chassis, wherein the elastically elongatable panel comprises: a. at least one cover layer (13, 13'); and b. an elastic material selected from the group consisting of an elastomeric film, and a plurality of elastic strands; the elastic material attached to the cover layer (13, 13'), a. at least one cover layer (13, 13'); and b. an elastic material selected from the group consisting of an elastomeric film, and a plurality of elastic strands; the elastic material attached to the cover layer (13, 13'), wherein said least one cover layer (13, 13') and elastic material are joined by mechanical bonding, at a plurality of discrete bonding elements and wherein each said panel comprises a plurality of wrinkles having peaks and troughs formed on at least one of said cover layer (13, 13'), wherein said panel comprises an average of no more than two, preferably no more than one, wrinkles between two consecutive discrete bonding elements along a panel length extending substantially parallel to the transverse axis, and characterised in that said panel comprises a wrinkle distribution of at least 1.1 wrinkles/mm, according to the method herein; and wherein a first distance between neighbouring discrete bonding elements along an axis substantially parallel to the panel length is less than a second distance between neighbouring discrete bonding elements along an axis substantially perpendicular to the panel length.