Devices having real or synthetic hair that are worn on a user s head to complement, accent, or otherwise alter the appearance of the user's hair are disclosed. According to one embodiment, a hair addition for providing a bump up effect includes a foundation, a plurality of attachment members coupled to the foundation for attaching the foundation to a wearer's hair, a plurality of hair strand retention members spanning the foundation, and a plurality of hair strands coupled to the hair strand retention members and collectively concealing the foundation, the attachment members, and the hair strand retention members. The foundation has an outer frame and a plurality of shaping strips. The outer frame defines front and rear sides and opposed ends. The shaping strips extend from the front side to the rear side, and each shaping strip is bendable and retains its form until further manipulated.