How to choose an office chair that does not sag quickly?

Question

Workplace

Hello, mine has already sagged and sank very quickly, I bought a chair for 7 thousand rubles. Advise some chair, or tell me how to choose it correctly so that it doesn’t sag quickly, I heard that there is a chair swap, but I couldn’t find it. Maybe I'm not composing the request correctly, maybe something else.
I don’t know what they are called exactly either, I saw them a year ago. Subject.

Answer 1

I bought myself for 9 good-kresla.ru/catalog/kreslo_rukovoditelya_Nickol...
The company itself (whose website) has high prices - they sell through dealers, those prices are 30-40 percent lower.
There is no swap, but it is designed for a mass of up to 250 kg.

Answer 2

tags: php, jquery
Looking for a chair for web development? :)

Answer 3

Well, apparently, to lose weight)))
I have such a chair: (throw it on for another 20 years) I am
very pleased with my back at once, it makes me keep it straight))

Answer 4

I advise you not to buy leather or leatherette, as the air will not pass ...
And in the summer there will be marks on the shirt, which is not at all pleasant ...