The disclosed technology is a car seat for infants suffering from acid reflux, embodiments of which include a car seat base or wedge frame and a removable rectangular frame. The removable rectangular frame has a flat child support surface, allowing the child to be secured to the removable rectangular frame. The wedge frame has a support structure along the interior thereof for supporting the removable rectangular frame within the wedge frame. The wedge frame and the removable rectangular base support the child support surface at an angle of about 30 degrees, or 28-32 degrees, or 20-40 degrees, relative to the wedge frame's bottom plane.