Very comfy
If arms would turn to get out of your way when required, that'd make perfect. They really need to include flat washers together with the bolts.

All-Day Body Support: Long hours at a desk can leave your back and neck feeling tired. This ergonomic desk chair combines an S-shaped backrest, adjustable lumbar cushion and rotating headrest to follow your body's natural curves, helping you stay supported through work, study or gaming.
Flexible Arm Positioning: Fixed armrests can force your shoulders and elbows into awkward positions. The 3D armrests move up and down, forward and backward, and pivot left and right, giving this computer chair with adjustable arms the flexibility to suit different desks and sitting positions.
Personalised Reclining Comfort: Staying in one position for hours can make working and relaxing uncomfortable. The 105degrees, 120degrees and 135degrees tilt-lock positions let you choose the right angle for focused work, reading or reclining, while the 5cm height-adjustable headrest rotates 60degrees for more targeted neck support.
A Better Fit for Different Users: A seat that is too high or low can make it difficult to maintain a comfortable position. With 10cm of seat-height adjustment and 4-height adjustable lumbar, this adjustable computer chair can be fine-tuned to suit different body shapes and desk setups for more balanced support.
Breathable Yet Supportive: Heat and pressure can become distracting during long sitting sessions. The high-resilience mesh back promotes airflow, while the high-density memory foam seat provides a supportive yet comfortable feel, making this home office chair suitable for extended daily use.
Very comfy
If arms would turn to get out of your way when required, that'd make perfect. They really need to include flat washers together with the bolts.