The present invention provides for a weatherstrip assembly for a motor vehicle. The assembly includes a carrier having a base and a first and second leg extending from the base to a first and second distal end, respectively. The legs are spaced from each other to define a channel for receiving the motor vehicle. A seal is mounted to the first distal end. At least one securing flange is coupled to the second distal end for fastening the carrier to the motor vehicle. A living hinge is disposed between the securing flange and the second distal end, such that the securing flange is moveable independent of the carrier. The living hinge comprises a first section having a generally recessed configuration and a first thickness, and a second section having a generally planar configuration and a second thickness. The second section comprises a first region extending between the first section and a first terminal edge of the living hinge, and a second region extending between the first section and an opposing second terminal edge of the living hinge. The second thickness is greater than the first thickness.