Special Tomato offers the Soft-Touch Sitter in several sizes and configurations. The Soft-Touch Sitter with Tilt Wedge was created to provide proper seating posture to children with mild to moderate physical involvement. By adding the Tilt Wedge Base, a child can get down to peer level. This stationary base is a wooden base that has been weight tested to hold a child aged 6-9 years old and 40-80 lbs with the size 3 Sitter attached.?Weight capacity: 40-80 lbs.