Bamboo Bodifying Complex and Keratin Healing System dramatically boost volume and thickness to fine, thin, flat hair. Increases hair thickness by up to 55%. Delivers microscopic bodifiers deep into the cortex to provide added lift. Builds body & fullness while providing abundant support. Delivers weightless texture & added shine. Thermal Protection up to 482 DegreeF (250 DegreeC). Hold: 6 of 10.