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 ; 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 , wherein said least one cover layer 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 , 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 (L) 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 (L) is less than a second distance between neighbouring discrete bonding elements along an axis substantially perpendicular to the panel length (L). 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 ; 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 , a. at least one cover layer ; 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 , wherein said least one cover layer 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 , 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 (L) 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 (L) is less than a second distance between neighbouring discrete bonding elements along an axis substantially perpendicular to the panel length (L). <EOS>