The design of the original SpinaliS chair model the BASIC was inspired by the dynamic sitting on a gym ball. Like all other SPINALIS chairs, the seat is mounted on a spiral which provides flexibility of the seat allowing for a tilting action in all directions without vertical bouncing. The wobbliness of the seat stimulates a stabilizing action by the user’s own core stability muscles while the return force of the spiral produces a springy feeling which will additionally activate your postural mechanisms resulting in a properly balanced posture. Spring mechanism in the backrest provides firm but dynamic support allowing for additional freedom of movement. Relatively small size of the round shaped seat makes this SpinaliS chair model particularly suitable for children and adult users with petite body type. Children who are particularly inclined towards frequent movements during sitting will benefit greatly from using the flexible seat. Prevent your child’s posture deterioration with the Spinalis BASIC.