Instantly thicken hair by up to 11%** (and feel like you have 11,000 more hairs on your head***) with Aveda Invati Ultra Advanced Thickening Foam, a styling foam mousse for thinning hair. It creates thicker, fuller, more voluminous hair from roots to ends that lasts all day. This hair foam gives you all-day fullness and flexible, touchable hold without creating build-up or weighing hair down. The formula helps reinforce fragile hair and protects from blow-drying, plus reduces frizz and leaves hair shiny. Formulated without: Animal-derived ingredients, gluten, silicones, mineral oil, SLS/SLES, synthetic fragrance, parabens, phthalates, petrolatum, paraffin, and formaldehyde donors. Use with the Invati Ultra Advanced 4-step system of Exfoliating Shampoo, Thickening Conditioner, Revitalizing Scalp Serum, and Fortifying Leave-In Treatment. *Per the ISO 16128 Standard,from plant, non-petroleum mineral , and/or water. **Based on ex-vivo testing after using the Invati Ultra Advanced™ 5-step system of shampoo, conditioner, serum, leave-in and foam. ***On average, people have 100,000 strands of hair on the head.