Our Therapists recommend the Special Tomato Soft-Touch Liners for a child with mild to moderate sitting support needs. The Special Tomato Soft-Touch Back Cushion Liners do not come with a shoulder harness to support a child's trunk. So, if a child has decreased head and/or trunk strength, the Liners need to be attached to a seating system or stroller that has head support and/or a harness to support the child's trunk. For a seating system that provides trunk and head support for children who need it.