????Highest Quality 6A Grade Silk : Made from 100% Natural Mulberry Silk (Grade 6A). Material:100% Silk (Mulberry Silk, Grade 6A). ⭐️Perfect Fit for Long Hair (60cm Tube Style) : This unique tube/cylinder style cap has an extended length of up to 60cm, allowing even the longest or thickest hair to fit comfortably inside without bending or knotting.