Ranging from high naturalism to ornate sculptural forms Tregloan's costuming integrates with the physicality of performance, the nuance of narrative and visual dramaturgy of the scenography. Her designs have been seen in operas, music events, contemporary dance, live art, physical theatre and contemporary theatre productions.

Ranging from high naturalism to ornate sculptural forms Tregloan's costuming integrates with the physicality of performance, the nuance of narrative and visual dramaturgy of the scenography. Her designs have been seen in operas, music events, contemporary dance, live art, physical theatre and contemporary theatre productions.