Quite nice, but not force required

I've bought the massage rollers, because my physical therapist told me about it.
Yes, they serve their purpose, but a physical therapy or a regular massage of course they did not replace. That's not the reason why I gave only 3 stars, but because I would have expected otherwise, the material a bit and because I personally will probably be used more often.
The rollers are made of a hard polystyrene, which feels a bit strange at first. I had actually expected that they consist of a hard rubber or the like, which would have liked much better.
I can only say that it works, and I will use it in case of complaints as well, but for regular use then missing me the time and leisure to use.
All in all it is a good product that certainly can be improved a bit. For each of the complaints must often times massaging of the muscles, for it is certainly convenient, but for normal amateur athletes I think it is not necessary.