DESIGN ESSENTIALS HCO LEAVE-IN CONDITIONER is a fast-acting moisturizing conditioner that penetrates deep within the hair shaft to replenish needed proteins. Benefits: Replenishes the hair with Hydrogen, Carbon and Oxygen (HCO) Immediately soften, detangles, moisturizes and infuses proteins to the hair upon application; Strengthens the hair shaft; Protects hair from thermal styling; Eliminates static, adds body and provides an excellent shine; Ideal for fine to medium hair textures Detangles on contact.