The uniquely designed ObusForme Seat evenly distributes body weight and encourages proper alignment of the pelvis and thighs for extended sitting comfort. Use it with any ObusForme Backrest Support to create a complete and comfortable ergonomic sitting experience. Features Contoured sides effectively support your pelvis and hips in a comfortably balanced position. Raised center portion separates your legs slightly and rocks your pelvis backward to eliminate excess lumbar curve and reduce spinal strain. Cut-out at the center of the seat’s posterior reduces pressure on your tailbone. Removable front zippered section adjusts the depth to accommodate almost any chair, allowing for proper knee clearance. Two tabs at the rear section allow you to securely attach your ObusForme ® Contoured Seat Cushion to any ObusForme ® Backrest Support. Polyurethane foam construction absorbs compression forces and dissipates vibration created in moving vehicles, reducing wear and tear on your spine.