A variable valve drive for changing control timing of cam-actuated gas-exchange valves of an internal combustion engine is provided, with a tappet, which, with convex cam engaging contour, engages a cam of a camshaft and which is guided so that it can move in the longitudinal direction in a rotatable tappet guide, whose rotational angle is adjustable for changing the control timing. Thus with two rotational axes available the user has the option of choosing the most comfortable penis position and can rotate the upper bridge in ascending-descending direction and right-left direction simultaneously. The bottom wall includes a first support disposed in the receiving space. Fasteners secure the receptacle to the frame of the backrest cushion. More particularly, twisted, low creep yarns formed by twisting together one or more high strength polyolefin fibers and one or more low creep reinforcing fibers.