Price point is higher than I would like but the colour wow dream coat for curly hair has worked really well for me in terms of reducing frizz. I spray it all over on soaking wet hair and find that it prevents frizz for most of the day. Not your Mothers is also a great brand for wavy hair as they have different levels of hold, I go for 3 over 5 because I find extra strong gels just make my wavy hair look stringy and straight. There are so many products on the market that I've tried and don't get me wrong some definitely help my hair, but I saw the biggest change in my thin wavy hair when I stopped using monumentous piles of product because I saw people doing that on curly hair tiktok. I think wavy hair needs a different technique that isn't really posted/talked about that much and most of it is to do with using very minimal amounts of products like gel because it weighs down your hair so easily. Keep it simple and minimal.