If itz not insulated does that mean it wont b warm and ill need an additional 2-3 layers underneath?

It all depends on the area that you are riding in. I run this for the majority of the year out in UTAH and it works great. You don't need to layer with three layers. Check out the different levels of layering by Burton. Lightweight, mid-weight and Expedition weight. http://www.dogfunk.com/snowboard/Burton-Bm-Tech-Polo-Top-Mens/BUR3334M.html

Whatup Tony. "Insulation" is that fluffy, white stuff kind of like what you'd find in a sleeping bag. Most snowboard jackets are "shells" which means they don't have insulation. That said, a shell jacket will still keep you warm in almost all situations. I personally shred in shell jackets. I prefer them because you can wear a layer or two underneath and then take off layers if it gets too hot. If you live where it gets really cold in the winter, you might want an insulated jacket. Otherwise you'll be good with a shell.

Whatup Tony. "Insulation" is that fluffy, white stuff kind of like what you'd find in a sleeping bag. Most snowboard jackets are "shells" which means they don't have insulation. That said, a shell jacket will still keep you warm in almost all situations. I personally shred in shell jackets. I prefer them because you can wear a layer or two underneath and then take off layers if it gets too hot. If you live where it gets really cold in the winter, you might want an insulated jacket. Otherwise you'll be good with a shell.

It depends on what the weather is like where you are, this is just a shell, it is meant to keep you dry, but not to insulate, so you may need to throw a sweater or thermal on underneath depending on how cold it is. I usually don't need more than a thermal and a tee underneath, just because of my high core temperature when I ride. I always wear a real jacket whenever the weather is really cold, my shell gets used mostly in the later part of the season.