This is it—the “holy grail” hair hero that started it all for K-PAK! Packed with a powerful combo of amino acids and Joico’s smart Keratin technology, this 5-minute treatment rebuilds and strengthens stressed strands to instantly restore hair to its healthy-looking greatness. It’s hair reconstruction so targeted, so transformative; it’s the fave of millions of stylists, and we have the awards to prove it*.