Design Essentials STS Express Max Smoothing Mousse Step 2 - Pro 8 ozDesign Essentials STS Express Max Smoothing Mousse Step 2 delivers professional grade smoothing power in a lightweight formula. This 8 oz mousse works as the essential second step in the STS Express system, locking in moisture while creating a protective barrier against humidity and frizz. Perfect for achieving sleek, polished results at home or in the salon, it provides lasting smoothness without the weight. Ideal for all hair types seeking salon