TIRTIR waist protection and posture correction cushion, recommended by friends. Is this brand of waist pad easy to use?

I don't recommend brands, only the cushions I tried. After stepping on countless pits, I chose a cheap ice pad as the most suitable cushion, not the so-called high-end brand. Everyone has different needs, especially the cushion, which has been used for a long time. A little difference will make a huge difference in demand. Be sure to choose according to your own situation. Expensive may not be suitable for you, and cheap may not be impractical. I use an ice pad myself, but I don't think you need to cool down in this situation, but your stool is too hard. In this case, it is best to choose a simple cushion, which is not particularly expensive. As long as the stool is softer, you will feel much better. This is a fixed cushion with backrest, which is characterized by softness, but it is still very hot to sit on: the object pillow lives in the integrated cushion, and the integrated cushion is thickened. Back cushion near JD.COM? 39.00 I went to buy a red envelope with straps inside. There are two kinds, which can be tied to chairs: JD.COM Gong Xun office chairs with thick cushions, student stools with cushions and tatami mats at the bottom? 9.90 If you want to buy a brand, air fiber can also solve the problem that the chair is too hard, that is, the price is high: pineapple zebra breathes in summer, Japanese black technology 4D air fiber cushion bird's nest zebra JD.COM? 458.00 All the above three are soft and hot. The chair in the dormitory is too hard. You can choose this one. If the subject also thinks that the stool is not only hard, but also stuffy and hot, you can refer to my experience in choosing a cushion: what cushion is better for sedentary hips?