Hair oil is beauty’s multitasker. It improves volume, shine and smoothes even the frizziest hair into submission. Olive, argan and coconut oils are ideal for thicker styles and Afro hair. Meanwhile, apricot and camellia oils won’t weigh fine hair down. Whatever your hair type, we’ve got you covered with the best Prime Day hair oil deals. Add them to basket fast, though – there’s only a few hours of Amazon Prime Day left!