As the innovator and leader in texture technology, ISO continues the tradition in keeping within trends of superior products that give you the power to volumize, curl, shape and style - without damage. ISO Option 1 for normal and previously permed hair: For great stand out style, this thio-free Wave Option is ideal for building definition through separation and loose, free-moving texture. Ideal for normal and previously permed hair. Gives lift and promotes movement through soft, loose texture. ISO Option 2 for every type color-treated hair: Exclusively formulated for tinted or color-treated hair. Option 2 brings gentle, yet effective wave action to hair. Thio-free and formulated with naturally derived isoamine to nourish and leave hair cuticle supple and smooth. Optimum curl results, healthy hair and color. ISO Option 3 for extra-firm curl on normal and resistant hair: Designed for normal to resistant hair, Option 3 produces big, expansive curls while retaining the hair\'s natural beauty and shine. Ideal for dramatic and high fashion styling. ISO Option EXO is a damage-free Exothermic Perming for energized curls on longer and resistant hair: This thio-free, damage-free exothermic formula diffuses more evenly than conventional perms to minimize swelling of the hairshaft. Leaves the cuticle damage free.