When I made the shell around the cell phone I could tell the tension of the material. I thought that lays over time - but that was not satisfactory.
3 days later I noticed that is broken, the material on the right side (on / off / lock button). In addition I have changed a lot myself, but the shell still be used. But when even the left side (cut-out for the loud / quiet key) is broken, I have done the shell unnerved away.
Conclusion: not fit for the S5 / too much tension -> not advise !!!!!!!