The Bellport outlets is an outdoor mall with over 25 actual stores. It is located on Exit 56 off of Sunrise Hwy
The Gap outlet is one of the best stores in the outlet, that has many bargains. On the other side of Sunrise Hwy they have Nike, Bass, and a couple of other stores. Unfortunately, many of the stores have closed because of the Riverhead outlets, but if you don't want to go all the way out to Riverhead, this is a good place to shop.