What it is: Barrier Defense Booster by Dermalogica is a concentrated oil booster that soothes and moisturizes to restore balance to sensitive skin. Triple defense complex nourishes the skin, relieves dryness and reinforces barrier integrity against future irritation. Squalane locks in moisture while soothing oat oil helps combat sensitivity and support healthy-looking skin. Use prior to, or mix with, your moisturizer for UltraCalming benefits. How To Use: Dispense a small amount into palm and rub hands together. Pat gently over face and neck. Or, mix with your moisturizer, then apply. Use twice a day for continuous relief.