My hair is nearly always dry - it's coloured and curly and lasts about two days before it starts to frizz. Dove Style and Care Nourishing Dry Ends Serum takes my hair from two days to about four which is really impressive.
Two pumps from the glass bottle is all you need to give curly dry hair shine and I now carry it in my handbag for last minute scrunches with product before I leave my desk. It doesn't seem to weigh my hair down, is non-greasy and smells really, really fruity and lovely - so gets 10/10 from me!
Try it from Boots - at around £3 it's a bargain!