Blistex DCT combines moisturizers and vitamin E to provide a daily maintenance regimen for your lips. DCT keeps your lips in perfect condition every day of the year, in all climates, through all activities. Smooth & Supple Lips: DCT nurtures your lips with two proven moisturizers plus Vitamin E. DCT softens and smoothes the surface of lips to help them look and feel young. DCT helps to prevent and replenish moisture-starved cells that can occur from daily exposure to dry air and other environmental conditions.