Treat hair to featherlight moisture from wash to prep with fan-favorites from Bumble and bumble. This Hairdresser's Invisible Oil grand collection set gives you four hydrating heroes in one try-me-sized set. How do I use it: Work shampoo into wet hair, lather well and rinse thoroughly. Smooth conditioner into hair from roots to ends. Leave in for a minute or two and rinse thoroughly. Then spray the primer on damp or dry hair, comb through, and style. After shampooing, apply mask to damp hair. Leave on for three to five minutes, and rinse. Use weekly. For fine to medium hair: apply a quarter-size amount from mid-shafts to ends. For medium to coarse/thick hair: apply a palm-size amount from roots to ends. Use enough to saturate the hair. From Bumble and bumble. Includes: