Prime-line Free, an addition to the Prime-line series, is a free-standing model. The oval bathtub is generously dimensioned and can be used from both sides due to the double formed sloping backrests. Striking is the seamless transition from the bathtub to the outer cover. The bathtub thus appears as a closed, homogeneous unit. The convex inner surface is completed by the concave arched outer form, and also the inner ledge between the bathtub edge and the side wall are depicted again on the outside.