Nordic Hydra [Source] is a moisturizing serum for hair and scalp. As the name suggests, the serum hydrates the scalp and is an excellent product for the northern cold, where hair and scalp are put to the test.
The serum does not leave hair feeling greasy and can be applied right after washing. The effect is noticeable right after the first application. The product has been a lifesaver for my dry and flaky scalp, and thanks to the product, I can go longer between washes, and the itching and dryness in my scalp have significantly decreased.
The product is very economical. I have used it with every hair wash for 2 months, and there is still some left. The only downside I would mention is the dropper, which does not dispense the product properly.