It’s all a very poor design. The seat is also mesh! The back mesh doesn’t give you support. The lumbar support isn’t useful. The slanting wheel base makes it difficult to rest your feet on as well.
I tested this chair out briefly in the store and thought it was comfortable especially for my size (I'm 5') but after a day of using it at home I'm definitely not a fan. The lumbar support is extremely aggressive and it feels like it is bruising my lower back. The mesh is really rough and scratchy and the headrest placement is awkward/far forward. The seating positions are also awkward -- you're either super upright or super reclined. Thankfully I still have time to return it!
This is an excellent chair for the price. We now have two. Delivered the next day and the assembly is a sinch. If you are looking at the Herman Miller options this is an excellent alternative with huge feature overlap for a fraction of the price. Time will tell if it holds up against the Herman Miller quality.