An intervertebral spacer includes a non-rigid body having an upper beam member and a lower beam member. The upper beam member may include a lower inner surface and may include an upper outer surface configured to interface with a vertebral plate of an upper vertebra. The lower beam member may include an upper inner surface and may include a lower outer surface configured to interface with a vertebral plate of a lower vertebra. The upper inner surface of the lower beam member and the lower inner surface of the upper beam member may define an oval-shaped hollow portion.