Abstract: A double fastening system with a slit for using in disposable articles such as disposable diapers having a backing sheet, a liquid permeable cover and an absorbent core disposed therebetween. The fastening system comprises two adhesive regions (15, 16) symmetrically opposite with relation to the longitudinal axis (Y--Y) of the disposable article and applied to the exposed surface of the liquid permeable cover, regions (15, 16) being separated by a slit (17), parallel to the transversal axis (X--X) of such article.

Abstract: Disposable diapers with an anatomical configuration and adaptable to the user's body are described herein.Some of the most usual prior art problems are cutting the material in the crotch portion, shifting of the absorbent structure, discomfort when using a disposable product and less absorbent capacity.Such problems are solved in the present invention by providing a diaper which has, in combination, a substantially rectangular panel without cuts, an absorbent structure (4), comprising three layers, the first layer (5) allowing liquid penetration, the second layer (6) uniformly distributing the liquid and the third layer retaining the liquid, elastic means (9) in the crotch portion, shrinkable means around the thighs region, and pouch-like formations (12) for retaining said liquid consisting of channels (10) and bulges (11).