Finally Hair Spray - Medium Hold Fiber Lock - The Perfect Fiber Hair Spray Finally Hair's Fiber Lock Hair Spray. The ideal hair spray for holding fibers in place. SEE OUR OTHER LISTINGS FOR STRONG HOLD SPRAY IF YOU WANT A CLEAN PILLOW! This hair spray is specially formulated and highly tested to be the optimum hair spray for fiber control. Simply apply the fibers and spray our fiber lock spray and be confident that you will have the ideal hold. Many people sleep with our fibers using this spray. The spray was designed for minimal pillow residue. Hardly any fibers come off using our Fiber Lock spray. Wind resistant, sweat resistant, strong yet it won't leave you looking like your hair is glued on. We formulated this spray to relieve the typical dirty look many hair sprays create. Each bottle contains 120ml (4.06 OZ.). Use it sparingly. You don't need to much.