I ordered this chair because of its 300 pound capacity (I am a big man, ~280). The casters were the first to go, I had to replace with extra heavy duty casters after about 3 months. Then the base went afteer about 6 months (caster holes gave out). My office has hard solid vinyl floor (no carpet). The base is made out of some kind of plastic or composite material. -- It is a very comfortable chair, but if you are a big or heavy person, and do much rolling around behind your desk, dont expect the lowers to last. By the time I bought extra heavy duty replacement parts, I spent nearly $250.
If you are an average-sized person, IM sure this chair is great.
Not so heavy duty
I ordered this chair because of its 300 pound capacity (I am a big man, ~280). The casters were the first to go, I had to replace with extra heavy duty casters after about 3 months. Then the base went afteer about 6 months (caster holes gave out). My office has hard solid vinyl floor (no carpet). The base is made out of some kind of plastic or composite material. -- It is a very comfortable chair, but if you are a big or heavy person, and do much rolling around behind your desk, dont expect the lowers to last. By the time I bought extra heavy duty replacement parts, I spent nearly $250. If you are an average-sized person, IM sure this chair is great.