A closing device, consisting of a zip fastener and a track thereto, which the zip fastener has an angular body longitudinally on its side edge. The median of the angular body of the zip fastener is substantially orientated perpendicularly to the axis of the flat body of the zip fastener or to the surface of the linen or wall attached to it. On the opposite side of the zip fastener is either the extension of the linen which is an integrated part of the zip fastener or an attach by contact to the linen or a longitudinal gap forming two elongated pellicles allowing contact and wrapping for a link to a linen or a wall. A track for zip fastener designed to allow the penetration of the angular body of the zip fastener inside of it between two walls, which their axis are substantially parallel separated by a gap allowing the sliding of the zip fastener in the track. A third wall in the track substantially orientated perpendicularly to the two substantially parallel walls allow the possibility of a tight or releasable holding of the zip fastener in the track by opposition to the angular body of the zip fastener which forms a locking restriction to the angular body of the zip fastener.
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