BARBER501 Shaving Booster Smoothie 300 Barber501 Shaving Booster Shaving Balm for Men 66ml * 1ea eBay BARBER501 Shaving Booster Smoothie 300 Barber501 Shaving Booster Shaving Balm for Men 66ml * 1ea eBay. The first ever rinse off formula in Korea that softens your beard with just application! The SHAVING BOOSTER allows for a smooth shave without any irritation. This shaving booster smoothie allows a smooth shaving while protecting the sensitive skin from irritation by its oil protective film. Features three options in jumbo size to cater different types of skin problems such as sagging, irritative and oily skin. Enriched with different kinds of Vegatable Oils and Extracts, it moisturizes and soothes the skin. With a slightly acidic formula and passed skin irritation test, it is suitable for sensitive skin.