Dull hair
Your curls may be lacking shine if you have too much product build up, split ends or cuticle layer damage from your hair rubbing on your clothes, weathering, excessive combing, heat or chemical damage.
A few ways you can restore shine to your dull curls is to clarify or detox your hair of product build up with a clay, keep up with protein and deep conditioning treatments to fill in the gaps in your cuticle layer, creating smooth strands and shine. And seal in moisture with oils if you have looser curls, fine or low porosity hair or butters if you have tighter curls, thick or high porosity hair.