LSFB (Latex Saturated Fiber Board) is a thin, flexible caselining material designed for applications where a lightweight, pliable board is needed. Its latex-saturated fiber construction provides flexibility and durability for soft-cover books, journals, diaries, and turned-edge binding applications. LSFB is also an excellent choice for religious texts, where it is commonly used as an inner lining beneath PU cover materials for hymnals and soft-cover Bibles. Available in .015 caliper, LSFB provides a slim profile while maintaining the flexibility needed for a clean, finished cover.