A strap (1) is described, intended for a sling for persons, where the strap (1) is elongated with short end edges (5) and longer lateral edges (7) and comprises a first belt (9) and a second belt (11). Each belt comprises an inside (13) and an outside (15), where the insides (13) are turned towards one another, and the outsides (15) are turned away from one another. The first belt (9) and the second belt (11) comprise warps and wefts. The strap (1) has a longitudinal direction (21) that is parallel to the warps, and a transverse direction that is parallel to the wefts. In the longitudinal direction (21) of the strap (1) there are a number of first sections (23), where the first belt (9) and the second belt (11) are interwoven, and second sections (25) are provided between them, where the first belt (9) and the second belt (11) are not interwoven, so that an eye is formed in each of the second sections (25). The warps are produced in at least three different colours, and the warps are led in two outer layers and at least one intermediate layer in each of the two belts (9, 11) with optional colours in the individual layers. In the longitudinal direction (21) of the strap there is a sequence of colours and/or patterns, marking each eye in the strap (1) unambiguously.