I was told by a hairstylists to get a dryer with at least 1750 watts. You also want it to have heat setting (low, med, high) instead of just 'off' and 'on'. 'Cool shot' is nice to have but I never used it. I'd also like to add that I received this advice while seeking to straighten so it may or may not be of use.
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4b/Density:iii/Strands:Fine, Low Porosity/MBL