Hair Straightening Product

I'm an asian and my hair is wavy. I already used olive oil relaxer kit last month and last week but it only last for a week. Can anyone suggest what product would I used that would last for 6 months or longer. Hair Straightening Product
Try the CHI it leaves your hair really smooth and straight i have wavy hair also and it works for me I love it! It lastes for quite a long time.

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