How does Sitness® technology work?With Sitness®, the support and the seat are dynamically connected.This design creates a whole new sensation when sitting down that continuously activates and strengthens the back muscles, without having to consciously think about it!What are the benefits of Sitness®?- Works the back and spine- Relieves intervertebral disc- Stimulates blood circulation- Enhances concentration- Boosts productivity "Lady Sitness" Office Chair• Material: 100% polyester• Swivel chair for ladies with oscillating seat• Backrest with special shape for the back area - women need more support in this area• Breathable seat with 7 different zones with varying degrees of hardness• Spring for pressure relief and optimal air conditioning• Special fitness seat with Body-Balance-Tec articulation for three-dimensional sitting• Seat height adjustment with Toplift• Double security casters braked according to weight, for carpets• Black polyamide base• Backrest height: 580 mm• Seat dimensions: (L)460 x (D)450 x (H)420 - 530 mm• Adjustable armrests of type "K2" with Softpad coating• BLACK seat, other colors available on request!Recommended sitting time: 7 hours and more- Recommended for intensive use in the office / privately- High comfort level- Highly ergonomic equipment- Tested according to standards EN 1335 1-3 and GS