The present invention relates to a downhole expandable tubular to be expanded in a well downhole from a first outer diameter to a second outer diameter for abutting against an inner face of a casing or borehole, the downhole expandable tubular having an outer face and a longitudinal extension, and comprising at least one first circumferential edge and at least one second circumferential edge provided on the outer face and spaced apart in the longitudinal extension, wherein a sealing element and a split ring-shaped retaining element are arranged between the first and second circumferential edges, and wherein the split ring-shaped retaining element has more than one winding, so that when the expandable tubular is expanded from the first outer diameter to the second outer diameter, the split ring-shaped retaining element partly unwinds. Furthermore, the present invention relates to an annular barrier.
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