Sensinity is a brand from Spain. Or at least a country using Spanish as their language. I can find very little about this brand online, but a pretty big number of webshops are selling them.
Here in Sweden they are being sold at grocery store such as "Willy´s" and "Coop". I´d like to say it´s a budget brand but they really aren´t that cheap here. I payed at least an average of 20kr per bottle for the ones I have and they are only 7ml bottles.
Sensinity´s nail polishes are a bit different from most polishes; they are scented. The "name" on the cap is actually not the name of the polish, but the name of the scent the polish has. Alas, they don´t have any names, only numbers. I think I have manage to collect about ten different scents so far, I am a bit nerdy when it comes to things like that, and I always look for new ones when I see them in the store.