Trim for automobile vehicle comprising: a) A substrate formed by: i. a three-dimensional fabric comprising: - a first layer (1.1) of knit fabric, - a second layer (1.2) of knit fabric (1.2.1), and - an intermediate layer (1.3) formed by yarns connecting said first and second layers, wherein the first layer (1.1) and the second layer (1.2) comprise polymeric fabrics and the intermediate layer (1.3) comprises polymeric yarns (1.3.1), ii. and a solid resin that maintains the shape of said three-dimensional knit fabric, according to the shape of the trim, b) a superficial decorative layer, wherein said trim has a defined, three-dimensional and non-flat shape, and is self-supporting, due to its structure according to which: - the solid resin connects each yarn (1.3.1) of the intermediate layer (1.3) with a nearby yarn (1.3.1) forming junction bridges (2.1) that maintain the separation between said yarns and their relative position, - and at least one of either the first layer (1.1) and the second layer (1.2) is in contact with the solid resin. a) A substrate formed by: i. a three-dimensional fabric comprising: - a first layer (1.1) of knit fabric, - a second layer (1.2) of knit fabric (1.2.1), and - an intermediate layer (1.3) formed by yarns connecting said first and second layers, wherein the first layer (1.1) and the second layer (1.2) comprise polymeric fabrics and the intermediate layer (1.3) comprises polymeric yarns (1.3.1), ii. and a solid resin that maintains the shape of said three-dimensional knit fabric, according to the shape of the trim, i. a three-dimensional fabric comprising: - a first layer (1.1) of knit fabric, - a second layer (1.2) of knit fabric (1.2.1), and - an intermediate layer (1.3) formed by yarns connecting said first and second layers, wherein the first layer (1.1) and the second layer (1.2) comprise polymeric fabrics and the intermediate layer (1.3) comprises polymeric yarns (1.3.1), - a first layer (1.1) of knit fabric, - a second layer (1.2) of knit fabric (1.2.1), and - an intermediate layer (1.3) formed by yarns connecting said first and second layers, wherein the first layer (1.1) and the second layer (1.2) comprise polymeric fabrics and the intermediate layer (1.3) comprises polymeric yarns (1.3.1), ii. and a solid resin that maintains the shape of said three-dimensional knit fabric, according to the shape of the trim, b) a superficial decorative layer, wherein said trim has a defined, three-dimensional and non-flat shape, and is self-supporting, due to its structure according to which: - the solid resin connects each yarn (1.3.1) of the intermediate layer (1.3) with a nearby yarn (1.3.1) forming junction bridges (2.1) that maintain the separation between said yarns and their relative position, - and at least one of either the first layer (1.1) and the second layer (1.2) is in contact with the solid resin. - the solid resin connects each yarn (1.3.1) of the intermediate layer (1.3) with a nearby yarn (1.3.1) forming junction bridges (2.1) that maintain the separation between said yarns and their relative position, - and at least one of either the first layer (1.1) and the second layer (1.2) is in contact with the solid resin.