A method for selectively machine directionally stretching a predetermined section of a pre-combined web material, said method comprising the steps of a) providing an essentially continuous pre-combined web exhibiting an x-direction aligned with the machine direction, a width corresponding to the cross machine direction and a thickness perpendicular thereto at an infeed speed said web comprising a1) at least one essentially non-elastic fibrous sub-layer and a2) at least one elastic sub-layer, said sub-layers being connected to each other and said web comprising in a repeating sequence a first region exhibiting a narrower effective material width than a second region, wherein said first region defines a first pitch length, and said second region defines a second pitch length, both defining, optionally with further repeating regions or transition regions, a repeating overall infeed pitch length; b) providing a selective stretching tool comprising a first and a second roll, defining a stretching zone along the web path between them; c*) operating said second roll at a preset and essentially constant second roll speed which corresponds essentially to an outfeed speed; d*) operating said first roll at a predetermined first roll speed, which is d1*) either constant at a speed lower than said second roll speed or d2*) oscillating between d2i*) a speed lower than said second roll speed and a speed equal to said second roll speed or d2ii*) a lower speed and a higher speed, such that the integral over time of the speed profile of the first roll over a time increment corresponding to a pitch length is smaller than the integral over time of the speed profile of the second roll, whereby said speed differential between said first and said second roll extends said first region of said web to a greater extent than said second region, thereby increasing the first region pitch length as well as the overall pitch length for the outfeed compared to the infeed. a) providing an essentially continuous pre-combined web exhibiting an x-direction aligned with the machine direction, a width corresponding to the cross machine direction and a thickness perpendicular thereto at an infeed speed said web comprising a1) at least one essentially non-elastic fibrous sub-layer and a2) at least one elastic sub-layer, said sub-layers being connected to each other and said web comprising in a repeating sequence a first region exhibiting a narrower effective material width than a second region, wherein said first region defines a first pitch length, and said second region defines a second pitch length, both defining, optionally with further repeating regions or transition regions, a repeating overall infeed pitch length; a1) at least one essentially non-elastic fibrous sub-layer and a2) at least one elastic sub-layer, said sub-layers being connected to each other and said web comprising in a repeating sequence a first region exhibiting a narrower effective material width than a second region, wherein said first region defines a first pitch length, and said second region defines a second pitch length, both defining, optionally with further repeating regions or transition regions, a repeating overall infeed pitch length; b) providing a selective stretching tool comprising a first and a second roll, defining a stretching zone along the web path between them; c*) operating said second roll at a preset and essentially constant second roll speed which corresponds essentially to an outfeed speed; d*) operating said first roll at a predetermined first roll speed, which is d1*) either constant at a speed lower than said second roll speed or d2*) oscillating between d2i*) a speed lower than said second roll speed and a speed equal to said second roll speed or d2ii*) a lower speed and a higher speed, such that the integral over time of the speed profile of the first roll over a time increment corresponding to a pitch length is smaller than the integral over time of the speed profile of the second roll, whereby said speed differential between said first and said second roll extends said first region of said web to a greater extent than said second region, thereby increasing the first region pitch length as well as the overall pitch length for the outfeed compared to the infeed. d1*) either constant at a speed lower than said second roll speed or d2*) oscillating between d2i*) a speed lower than said second roll speed and a speed equal to said second roll speed or d2ii*) a lower speed and a higher speed, such that the integral over time of the speed profile of the first roll over a time increment corresponding to a pitch length is smaller than the integral over time of the speed profile of the second roll, whereby said speed differential between said first and said second roll extends said first region of said web to a greater extent than said second region, thereby increasing the first region pitch length as well as the overall pitch length for the outfeed compared to the infeed. d2i*) a speed lower than said second roll speed and a speed equal to said second roll speed or d2ii*) a lower speed and a higher speed, such that the integral over time of the speed profile of the first roll over a time increment corresponding to a pitch length is smaller than the integral over time of the speed profile of the second roll, whereby said speed differential between said first and said second roll extends said first region of said web to a greater extent than said second region, thereby increasing the first region pitch length as well as the overall pitch length for the outfeed compared to the infeed.