Depends on your winter, how long your ride is, and why you're riding. Not very helpful, I know, but if I wanted to do 1-2 hour training rides in the bitter cold then for sure I'd have all the cycling specific clothing I could scrounge. But for my commutes of 8-10 miles, it's just generic active wear plus some decent jerseys. The fit and pockets are worthwhile for me so I feel like I can't do without. But when it's really cold (from my Southern perspective) I add a windbreaker or maybe sweater and sweat pants and not concerned about flapping drag or the extra bulk. Not for half an hour when I'm going 4 or 5 mph slower anyway.