The T3 Fit Diffuser is designed to volumize, define curls, and eliminate frizz for wavy, curly or coily hair. Its vented finger extensions distribute heat gently and evenly to speed up drying, while lifting and separating hair for enhanced volume and body. Compatible with the T3 Fit dryer only. The T3 Fit Diffuser is designed to volumize, define curls, and eliminate frizz for wavy, curly or coily hair. Imported. Volumizes, defines curls, and eliminates frizz for wavy, curly or coily hair. For women with wavy, curly or coily hair. Attach the diffuser to the T3 Fit dryer. Select your optimal heat setting on the dryer, then blow dry hair focusing at the roots. While drying, scrunch the hair with the diffuser from ends to roots to create defined waves and curls.