Joico Humidity Blocker Plus Protective Finishing Spray 3 Hold delivers protection from volume-deflating humidity. For best results, this weightless, fine mist aerosol should be sprayed 8-10 inches from the hair to deliver a physical shield against humidity. This unique protective finishing spray creates an invisible protective barrier around each of your hair strands to lock out humidity, eliminate frizz, and keep your volume and curls intact all day.