This sweatshirt is amazingly warm even in single digit temps.  When the temps go below 15 I add an insulated vest and that is it.  The hood is large enough to put over a cap or riding helmet and the inside zipped pocket is perfect for a cell phone.  The only very slight negative is that since the hood is large it sometimes gets in the way when you are working outdoors and you are turning your head side to side. I bought this sweatshirt for working outdoors and didn't want to spend $100+ on a work jacket.  It is perfect for me.  One more comment ... the wind does not penetrate this sweatshirt as with the medium weight version.