Olaplex Weighless Nourishing Mask delivers instant volume without heaviness, making it ideal for fine to medium hair types. Powered by Biomimetic Cuticle Technology, this mask seals and protects hair cuticles while infusing lightweight hydration that lasts through five washes. Experience visibly enhanced shine, reduced breakage, and strengthened strands that resist snapping—supporting your length retention goals with every application. Professional results, scientifically formulated. How to use: After shampooing, apply mask generously to wet hair, focusing on mid-lengths to ends. Leave on for 3-5 minutes, then rinse well. For best results, use weekly in place of conditioner.