Turns out not so good:
Had it been goretex it would been easy to duct tape. If the weather hadn't been so good the day after I ripped it I would have been forced to stitch it up, with an awkward fold right under the backpack. There are always drawbacks and advantages with all materials. Had it been T/C cotton (65/35) it would probably not have ripped as bad. I will continue to use cotton jackets, but I don't think I will shell out the extra for ventile or eta-proof again.
Had it been goretex it would been easy to duct tape. If the weather hadn't been so good the day after I ripped it I would have been forced to stitch it up, with an awkward fold right under the backpack. There are always drawbacks and advantages with all materials. Had it been T/C cotton (65/35) it would probably not have ripped as bad. I will continue to use cotton jackets, but I don't think I will shell out the extra for ventile or eta-proof again.