Abstract: A disposable absorbent brief having substantially straight parallel elastic members on either side of the crotch and separate means to secure the brief to the wearer's thighs and to the wearer's waist, said brief being especially adapted for use by wearers having adult leg configurations. The securement means which forms a thigh seal is placed within an anchoring region of the brief comprising the area between the edge of the brief and two line segments which lie transversely outward of the elastic member and which form angles of about 90 and about 140 degrees, respectively, in the plane of the diaper with respect to the elastic member. The apex of these angles is at one functional endpoint of the elastic member.