Liven up the look of your hair with the Biotin Boost Thickening Conditioner from Hask. This thickening conditioner is infused with biotin collagen and coffee to help boost and fortify strands for a voluminous look you will love. Formulated with tri-level thickening complex to help strengthen and give noticeable lift without weighing hair down. Simply apply to wet hair after shampooing for silky-smooth bouncy strands.