Bumble and bumble Bb. Curl Butter Masque, 200 ml, Hair Masks for Women, The Bumble and bumble Bb. Curl Butter Masque hair mask is an essential step in your hair care ritual. Give it a moment to regenerate and it will repay you with vitality and beauty. Characteristics: moisturises intensely hair is soft to the touch goes deep into the hair fibre How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.