- Lumbar support follows movements
- Seat distributes pressure well and remains soft
- Backrest somewhat unyielding
- Seat tilt not adjustable
The ThunderX3 Core Smart provides noticeable relief for the back: the large, flexible lumbar support follows your movements and stabilises the lumbar spine. It also has a soft seat that won't pinch your bum even after many hours. However, you need a little strength when leaning back. Once everything is adjusted, nothing rattles. Good for ergonomic sitting.



