What it is: A leave-in hair treatment adds resilience to the hair cuticle to stabilize thinning hair fibers from to tip, protecting from hair fall due to breakage.Who it's for: Ideal for thinning hair.What it does: Reduce hair loss with aveda's latest advancement for thinning hair: the invati ultra advanced 4-step system. This leave-in treatment for thinning hair is the final step in your 4-step routine. The strengthening formula helps reduce frizz for 24 hours, detangles hair and protects from heat damage (up to 450° F). How to use: Apply through damp hair. Do not rinse. Style as desired. Use as part of the invati ultra advanced 4-step system. Paraben-free; phthalate-free; sulfate-free; silicone-free; mineral oil-free; synthetic fragrance-free Dermatologist tested Vegan Made in the USA This brand has B Corp certification, representing business practices with emphasis on social and environmental performance, accountability and transparency This brand meets Nordstrom Responsible Brands criteria: brand adheres to responsible social and environmental practices