Johnson's Baby Shampoo: For gentle hair cleansing.

Johnson's Baby Powder: To keep skin dry and fresh.

Johnson's Baby Oil: For massage and moisturizing.

Johnson's Baby Lotion or Baby Soap: For moisturizing or gentle bathing.

Some sets might also include a small comb, cotton buds, or a storage caddy, but the core "4-in-1" generally refers to the main liquid/powder products. The sizes are often around 50ml or 100ml for the liquids, and 50g or 100g for the powder and soap.