The Giovanni Biotin & Collagen Strengthening Bundle delivers a nutrient-rich duo designed to visibly thicken, soften, and volumise flat hair. Set Contents: Biotin & Collagen Strengthening Shampoo 399ml This vitamin-rich shampoo cleanses while working to visibly thicken and strengthen individual strands. A blend of collagen and biotin transforms texture, leaving flat hair feeling hydrated and volumised. Biotin & Collagen Strengthening Conditioner 399ml A deeply hydrating conditioner formulated to restore body, shine and manageability to lacklustre lengths. Combining biotin and collagen, the formula detangles knots and smooths the hair's appearance for a thicker feel.