Goldwell Definition Acid Wave N/1 combines alpha hydroxy fruit acids in an innovative formula to deliver healthy, shiny, defined curls. With Definition, you can be sure you will achieve even, true to rod size, durable curls and the shiniest, healthiest hair possible. Do not process with heat. Follow the instructions carefully.

For normal, fine and slightly porous hair.

All domestic orders are fulfilled through shipping carrier Canada Post.

For all international orders, orders are fulfilled through UPS and DHL Express.

Get more information about Returns & Exchanges.

If you are not completely satisfied with an online purchase or gift, you may return your Canadian purchase in stores or by mail. Restrictions apply for returns made outside of Canada.