ProtoArc EC100 Ergonomic Office Chair, 10 cm spring cushion, lumbar support, adjustable headrest, black

Very comfortable chair, the seat is the good part: a wide saddle shaped cushion 10 cm thick with springs inside, so it does not flatten out after a few months. Wide seat at 51 by 51 cm, high mesh back, headrest that slides and rotates, and it locks upright or reclined at 130 degrees. It is already assembled and ready to sit on, nothing to build, you just take it away as it is. I bought it in September 2025 and hardly used it, so it is close to new. Product page: protoarc.com/products/ec100-ergonomic-ch…