The polish is quite thin when applied so I used 3 coats. A top coat is required as it chips very easily so I used OPI Nail Envy in matte as I prefer the effect not looking too glossy.
In temperatures over 33° C the polish turns Sky Blue.
In temperatures under 33° C the polish turns Purple.
But it's best when you have both to create various ombre effects!
I really like this nail polish. It's great fun having your nails change colour all throughout the day.
Word of warning: I tried the polish with Seche Vite Dry Fast Top Coat (my go to top coat) first but once dried the top coat just peeled off as don't use it. I have had no problems with the OPI Nail Envy which I used as a base and top coat however.