Bosley Hair Thickening Fibers – Light Brown 12g/0.42oz provide instant fullness by mimicking real hair and attaching to your existing strands with a natural negative charge. These keratin fibers blend seamlessly to cover thinning and low-density areas, creating a visibly thicker, fuller look in seconds.

Designed to resemble human hair, the lightweight fibers are easy to blend, letting you wear them daily, at work, or for a night out without a chalky residue or obvious texture. The negative charge helps them bond securely and resist wind or light movement, while the static-cling effect keeps fibers in place all day.

• Lightweight, natural-looking keratin fibers that blend with your hair
• Negative charge for strong, undetectable bonding to existing strands
• Covers thinning and low-density areas for an instantly fuller silhouette
• Static-cling effect minimizes dispersal and helps fibers stay put
• Color-matched Light Brown shade for seamless integration
• Convenient 12g / 0.42oz bottle for on-the-go touch-ups

Whether you’re addressing crown thinning or sparse roots, these fibers provide a practical, non-permanent solution that refreshes your look in moments.

Take a confident step toward fuller-looking hair with Bosley. Add to cart to experience subtle, lasting density with each application.