I have a super comfortable and durable office chair that has no brand markings on it. I've tried to order similar chairs 3 times and each one falls a little short with this Union & Scale chair being the closest so far.
This is actually the second Kroy Mesh Task Chair that I have purchased. I bought my first one a year and half ago to replace the chair at my employer's office. I could not sit for long stretches and my back really hurt at the end of the day. I purchased the Kroy chair and it has allowed me to sit supported and with back pain. Since we had to start working from home due COVID-19 I purchased my 2nd Kroy chair for my home office for the same reasons and got the same pain relief results.
As mentioned by other customers the chair is uncomfortably high at the lowest setting. I am 6 feet and after a couple of weeks with this chair my lower back hurts and my hips are strained from stretching my legs. I would recommend finding something more adjustable or replacing the hydraulic lift with a shorter one (like from an old chair if you can get it separated).