Mizani Thermastrength Heat Protecting Serum Works best with curly to tightly coiled strands Lightweight heat protector serum is packed with essential shea butter and anti-breakage technology to protect hair when blow drying, curling and straightening with thermal tools Moisturizing heat protectant for natural hair helps prevent breakage and damage from hot tools, while simultaneously controlling frizz and smoothing strands Heat tools are able to glide easily, taming hair and making it super manageable