That is a good question, Scorpio.

You have read right, a texturizer is a product that makes curly hair loose the tight curly shapes and look more like wavy hair in the form of wave shapes. A relaxer instead makes the hair completely straight. If you want to make your curly hair into a more "wavy" shape or want to make your curly hair less curly as you mention, then choosing a good texturizing hair product is essential to get the wavy smooth shape and not fry your hair in the process. Below you can find all the information that is all you need for your friend's desired hair shape.

For a texturizer to make curly hair into wavy hair, buy the S Curl texturizer kit through this Amazon distributor. You will also need to buy an activating and moisturizing product which is used daily to enhance the new waves in the hair and you will also need to buy a hair gel for leaving the waves fixed. About buying the "activating and moisturizing" product and the hair gel product for your texturized S Curls hair, I will be giving you the recommended links below but let me give you some more information on the S Curl texturizer.

With the S Curl texturizer kit, you only need to use one application that will last about 3 to 4 months until you outgrow the texturized hair with your natural curly hair (follow the application instructions for the texturizer that come with the S Curl kit). In the S Curl texturizer kit I linked above, the kit comes with 2 applications as I recommend you to buy a kit with 2 applications instead of one as you will be buying other products (activator/moisturizer + hair gel, see below) for your texturizing needs to get the full "smooth waves" effect so you might as well buy everything in one go and benefit from the low shipping costs of Amazon (Amazon is king for buying products like these ones!).

OK, once you have texturized your curly hair into the desired "smooth waves" hair ( aka wavy hair) with the S Curl texturizer in the link above, you then simply use every day a "activator and moisturizing" spray from S Curl and also use the a special hair gel from S Curl too for a more pronounced wavy hair effect (you can use other hairstyling products instead of the hair gel to style your new waves but it is best you buy now the S Curl hair gel anyway).

For the S Curl activator and moisturizer spray, buy it from this Amazon distributor and get the 32 ounce bottle if possible as the 8 ounce bottle will run out fast (the product in the link is the 32 ounce bottle).

For the S Curl hair gel, buy it from this Amazon distributor, it is very cheap so consider getting 2 or 3

I advice you to get the whole S Curl texturizing products from the Amazon distributors in the links I posted above as those have reviews and are trusted to deliver your order conveniently and as chosen.