Jack Black Double-Header Shampoo + Conditioner is a creamy, sulfate-free lathering formula that gently cleanses to remove oil and product buildup while conditioning, detangling and soothing a dry and dandruff-prone scalp. It hydrates and conditions, improving your hair's overall health. It contains creatine, which fortifies hair to increase strength and shine; coconut oil to deeply condition and detangle; and organic kelp to nourish and thicken. PureScience technology locks in nature's best, using a blend of naturally derived, gentle surfactants and certified-organic ingredients. Brand: Jack Black. Style Name:Jack Black 'Double-Header' Shampoo + Conditioner (33 Oz.) (Nordstrom Exclusive) ($66 Value). Style Number: 5170625. Available in stores.