Finally Hair STRONG Fiber Hold Spray - Fiber Lock - The Perfect Fiber Hair Spray. Finally Hair's Fiber Lock Hair Spray holds fibers all day - hardly any come off when you lay on a pillow. The ideal hair spray for holding fibers in place with confidence. SEE OUR OTHER LISTINGS FOR THE BEST HAIR FIBERS ON THE MARKET AT THE LOWEST PRICES ANYWHERE! 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.