We warn against using anything other than naturally derived oils to keep your roots moisturized while your hair is in braids. The most important ingredients to avoid are mineral oils. Please note that these are the key ingredients in most popular braid moisturizers.
Instead, opt for natural oils similar to the ones I just mentioned earlier like coconut oil and almond oil. These oils are great for soothing the scalp and retaining moisture without building up and clogging your pores like generic braid sprays often will. If you are looking for non-greasy moisture use a natural leave-in conditioner instead.