This deep-cleansing shampoo washes the week away. Bumble and bumble's Sunday Shampoo is a weekly clarifying shampoo that removes residue and buildup between shampoos. Perfect for infrequent washes. This weekly detoxifying shampoo removes buildup and residue. The deep cleanser lifts away product residue, excess oil, and built-up pollutants for a fresh, clean start.