Full-coverage restorations are indicated for posterior primary teeth as definitive treatments for high caries-risk children and in patients whose treatment is being performed under general anesthesia. Advances in biomaterials and parental preferences have driven interest in esthetic full coverage treatment options for primary posterior teeth. The prefabricated resin crown offers a 'flex fit' adaptation over the anatomic cervical convexity of the primary clinical crown, similar in functionality to a stainless steel crown. A new commercial product, BioFlx, hopes to address the ductility, color stability and durability concerns that glass fiber-reinforced composite crowns have while maintaining the enticing clinical aspects, namely the flex fit, esthetic appearance and more conservative tooth preparation when compared to pediatric zirconia crowns. The purpose of this case report is to describe an alternative restorative material that can be employed to deliver an esthetic full coverage solution in a child with a potential nickel allergy.