ISO's exclusive, patented, thio-free formula utilizes Isoamine, a naturally derived waving agent. Isoamine penetrates more deeply and evenly into the hair than conventional waving agents without aggressively lifting the cuticle. Since the internal structure and integrity of the hair is not disrupted, there is no need for conditioning additives that can hinder the perming process. The result is resilient curls and healthy hair Option 3 is designed for: Extra-firm curl on normal to resistant hair Normal to coarse textured tinted hair in good condition (20 volume or less) Resistant or gray hair Long, thick hair Experience the benefits of ISO Option 3: Can be self-timed or variable-timed Added pre-wrap No heat required Curl Pattern Firm Hair Type Resistant Formula Exothermic SKU 2694178
