- Get incredible body and volume, and add texture from the inside out, with RUSK® Thick Body and Texture Amplifier. Transform fine, limp, lazy hair into big, beautiful styles. Thick Body and Texture Amplifier contains Thermplex™ to boost body and volume from inside out, and wheat protein to add strength and moisture. Gives incredible body, volume, and added texture from the inside out. Becomes invisible in the hair. Spray liberally through towel-dried hair. Style with blow-dryer as desired.