I really need an advice. I don't care if my hair will be shiny and healthly after bio ionic. I want it to remain straight after sweating and swiming in sea water !! My hair is curly thick and smooth. I really want it to remain perfectly straight . I understand that after having the Retex Bio Ionic straight , you need to use some products from their company to help it remain straight. As in the japanese Thermal Reconstructing there's not such thing ! Also the new-growth in the bio ionic need to be restraightened all over again , and in the thermal reconditioning it need only that few centimenters , because the straight strands remain straight until you cut them ! And this sounds far more credible than using lots of products. Maibe after having bio Ionic I'll get out from the sea water with my hait fluffy again ! :( And that's not such a great idea , isn't it? :( So I really need to know wich one I should go for , and of course if some of you know the prices for a medium hair. Please help me !!