Is the 58-135 flexible?

I was wondering if these bubble seals are rigid or flexible? Our swinging shower door has always leaked and I could never figure out why until I took it apart and realized there should be a t-seal of some sort there. I've looked at other shower door t-seals but honestly think these bubble seals will work better. All the measurements are perfect as long as the material is flexible and not rigid. Thank you for the help and your time.

Thank you for the quick reply. I'll order it today and give it a try. If it works I'll take a picture and post it, so if anyone else is in the same spot I was it might help them.