There are a variety of ways to accomplish a Sedu type "straight hair" style. The Sedu iron is perhaps the best known but there are other brands that produce a hair iron similar to the Sedu. You can permanently accomplish a Sedu type look by having a hair relaxer applied to your hair by a stylist at a professional hair salon. Hair relaxers are not recommended for Caucasians with fine hair. Also, some hair treatments, shampoos and conditioners are on the market now that will temporarily relax your hair.