A vehicle air-bag comprising: first and second layers of fabric (2, 3) which each comprise a plurality of interwoven warp and weft yarns; an inlet aperture positioned in at least one of the first and second layers of fabric (2, 3), the inlet aperture being configured to be connected to a source of gas; a chamber which is at least partly provided between the first and second layers of fabric (2, 3), the chamber being in fluid communication with the inlet aperture and configured to be inflated by gas from the inlet aperture; and an elongate tether comprising: a first portion which is interwoven with a plurality of warp yarns in the first layer of fabric to integrate the first portion into a first part of the air-bag; a second portion which is not interwoven with any warp yarns, the second portion of the tether extending from the first part of the air-bag to a second part of the air-bag; and a third portion which is interwoven with a plurality of warp yarns in the second layer of fabric to integrate the third portion into the second part of the air-bag, such that the interweaving of the first and third portions (9, 13) of the tether modifies the structural properties of the first and second parts (11, 14) of the air-bag, wherein the tear strength of at least one of the layers of fabric (2, 3) of the air-bag is a first predetermined tear strength and the tear strength of each of the first and second parts (11, 14) of the air-bag is a second predetermined tear strength which is greater than the first predetermined tear strength, characterized by the second predetermined tear strength being between 80N and 300N or between 300N and 800N; and wherein the weft sett of the first and second layers of fabric (2, 3) is a first predetermined amount and the weft sett at the first and second parts (11, 14) of the air-bag is a second predetermined amount which is lower than the first predetermined amount; and wherein at least one of the first and second parts (11, 14) of the air-bag is positioned adjacent to the inlet aperture. first and second layers of fabric (2, 3) which each comprise a plurality of interwoven warp and weft yarns; an inlet aperture positioned in at least one of the first and second layers of fabric (2, 3), the inlet aperture being configured to be connected to a source of gas; a chamber which is at least partly provided between the first and second layers of fabric (2, 3), the chamber being in fluid communication with the inlet aperture and configured to be inflated by gas from the inlet aperture; and an elongate tether comprising: a first portion which is interwoven with a plurality of warp yarns in the first layer of fabric to integrate the first portion into a first part of the air-bag; a second portion which is not interwoven with any warp yarns, the second portion of the tether extending from the first part of the air-bag to a second part of the air-bag; and a third portion which is interwoven with a plurality of warp yarns in the second layer of fabric to integrate the third portion into the second part of the air-bag, such that the interweaving of the first and third portions (9, 13) of the tether modifies the structural properties of the first and second parts (11, 14) of the air-bag, wherein the tear strength of at least one of the layers of fabric (2, 3) of the air-bag is a first predetermined tear strength and the tear strength of each of the first and second parts (11, 14) of the air-bag is a second predetermined tear strength which is greater than the first predetermined tear strength, characterized by the second predetermined tear strength being between 80N and 300N or between 300N and 800N; and wherein the weft sett of the first and second layers of fabric (2, 3) is a first predetermined amount and the weft sett at the first and second parts (11, 14) of the air-bag is a second predetermined amount which is lower than the first predetermined amount; and wherein at least one of the first and second parts (11, 14) of the air-bag is positioned adjacent to the inlet aperture. a first portion which is interwoven with a plurality of warp yarns in the first layer of fabric to integrate the first portion into a first part of the air-bag; a second portion which is not interwoven with any warp yarns, the second portion of the tether extending from the first part of the air-bag to a second part of the air-bag; and a third portion which is interwoven with a plurality of warp yarns in the second layer of fabric to integrate the third portion into the second part of the air-bag, such that the interweaving of the first and third portions (9, 13) of the tether modifies the structural properties of the first and second parts (11, 14) of the air-bag, wherein the tear strength of at least one of the layers of fabric (2, 3) of the air-bag is a first predetermined tear strength and the tear strength of each of the first and second parts (11, 14) of the air-bag is a second predetermined tear strength which is greater than the first predetermined tear strength, characterized by the second predetermined tear strength being between 80N and 300N or between 300N and 800N; and wherein the weft sett of the first and second layers of fabric (2, 3) is a first predetermined amount and the weft sett at the first and second parts (11, 14) of the air-bag is a second predetermined amount which is lower than the first predetermined amount; and wherein at least one of the first and second parts (11, 14) of the air-bag is positioned adjacent to the inlet aperture.