Frizz Block Smoothing Spray creates an impenetrable veil of humidity-blocking, frizz-stopping, moisture-locking mist that protects strands for 72 hours. Created for harsh humid conditions, this heat-activated spray is the prescription-strength equivalent of traditional anti-frizz sprays. Virtue's proprietary Alpha Keratin 60ku instantly fills and seals cracked cuticles while featherweight polymers and lipids hover above, repelling air-born humidity. This lightweight, milky mist won't create buildup or dry out hair, and it's heat protective up to 450 degrees, leaving hair healthy, silky-soft and free of frizz for days. The fragrance is a restorative blend of herbs, fruits and citrus, incorporating soothing lavender and fresh mint essential oils.