Design Essentials® introduces the new and improved STS Express Smoothing System, an amino-acid infused smoothing and thermal therapy system that tempo-rarily straightens and smooths frizzy, naturally curly, multi-textured, transitioning, and chemically treated hair—providing up to 12 weeks of intense smooth-ness, incredible shine, and maximum manageability.

This easy, three-step system increases style longevity while helping to strengthen and repair damage. The STS Express Smoothing System saves time in the sa-lon—no need to shampoo or blow dry twice. Simply Shampoo, Treat, Seal, and Style for up to 12 weeks of visibly smoother, shiny, more manageable hair.