5th Avenue NYC. IPN: Interlock Protein Network. Detangle, condition and soften dry, brittle hair. All Soft Conditioner with Redken's exclusive Interlock Protein Network and keratin enrich complex with omega-6 enriched argan oil replenishes hair's protein, composed of keratin, and nourishes hair for intense softness. Hair is silky soft with increased manageability, suppleness and lasting shine. Safe for color-treated hair. redken.com. Guaranteed only when sold in salons. Made in USA.