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The hard ones are good, the soft ones are easy to deform, and the hairs are easy to stagger.
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The hard ones are better, and they clean faster.
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It's no problem to be hard or soft. As long as it's not a wire shabu.
The soft bristles are good, and the brush with soft bristles is relatively clean.
The question of whether the toilet is good for soft rubber or hard rubber is not very good, it is too soft to suck up, too hard, and there are gaps around it, which is also not good, so it must be moderately soft and hard.
Sofa with moderate hardness and softness.
The seat and backrest of the sofa should be curved to fit the physical and psychological structure, otherwise it will not only be uncomfortable, but also easy to form a bad sitting posture. When choosing a sofa, you can roughly calculate it after trying to sit: the height of the sofa seat should be equivalent to the height of a person's calf. >>>More
There is no uniform standard for this, and you can choose a sofa that fits hard and soft according to your preferences. >>>More
If it is mainly for adults to use soft is good because the bones are already set. >>>More