Frizzy hair, from smooth and sleek to cave woman! Products to stop the frizz?

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Any recommendations please?

Using straighteners on my hair or the Big Hair drier can give me lovely glossy smooth hair.....until I go outside...then I look like 'cave woman'.

Really frustrating, time taken to style, leave the house and arrive like I have been dragged through a hedge.

Have you any recommendations of a product to put in my hair when drying or to spray over when finished?

Moroccan oil is great on my hair

I hear mane n tail is amazing shampoo/conditioner, going to trial it on DD...