Discover Biolage Deep Treatment ColorLast Hair Mask for instant gratification and total hair transformation. Highly concentrated in caring agents for healthier-feeling hair with each use*. No more cold-water rinses or skipping shampoos to stretch out color vibrancy. This powerful hair mask prevents damaged, tangled ends and dull, faded color. Hair is immediately more vibrant, stronger and smoother*. Small but mighty, each pack contains at least four applications. Easy to squeeze, our packs are perfectly sealed for a fresh application each time. *when used as a system with Biolage shampoo.