The Nilaqua Rinse-Free Shampoo Cap allows you to wash your hair without using water! It is impregnated with shampoo and conditioner and wets your hair like a traditional shampoo then cleans without leaving any streaks or sticky residues. Just apply the cap to the scalp, massage until the hair is saturated and then towel dry and style as normal. Caps can be microwaved and are single use only.