This is your all in one. Top, bottom, hood, wrist gaitors, and even a poop shoot(and we all know you want one of those). The ninja suit is definetely too warm for a sunny spring day, but when its -10 and blowing, you will stay warm without a doubt. The wrist gaitors keep your arms from getting snow in them and the fit is great.
Bottom Line-If you want a base layer that will keep you going on those cold days, and a holloween costume for next year, the ninja suit is the way to go