The Amika Style Blockade Heat Defense Serum is formulated to protect your hair against the damaging effects of heat styling tools. This serum ensures that your hair remains smooth, manageable, and shielded from high temperatures during blow-drying, straightening, or curling. Use this lightweight formula before applying heat to lock in moisture and enhance your hair's natural defense system, resulting in a polished, salon-quality finish without weighing the hair down.