The goal of the project is to implement on-body vibrotactile feedback in interaction design. Thus, the project proposed Haptic Symbol, dynamic vibrotactile patterns linking to specific information cues, that are projected on the lower back. The concept shares the philosophy of semantics in linguistics, as well as the visual icons in traditional computer interface, where artificially attach meanings with association and metaphors to the signifiers. Thus, a co-design approach was proposed with a simple design tool, for the effective creation of dynamic vibrotactile patterns from a starting point of experience and feeling. In this way, the interaction design is emphasised, giving more autonomy to designers. The designed haptic symbols were implemented in a functional and experiential wearable prototype. The usability test shows that the designed patterns are recognizable and understandable, and the wearable interface to project haptic feedback on the lower back area is feasible.