L'Oréal Paris StudioLine Level 7 Style Rework Fibre 24H Reshaping Putty Hair - 2 x 150ml Bundle. Product Line: StudioLine. Item Type: Hair Styling Putty / Fibre Paste. Fibrous Technology: Stretchable fibers wrap around hair strands to give added texture, definition, and separation without a stiff or crunchy feel.