It' a jacket—it's a shirt.
The Nike Dimension Flannel Jacket packs jacket functionality into the laid-back look of a shirt. Zip up in this warm, lightly insulated jacket when you want to keep the fall chill off your back, but you aren't quite ready to bring out your down parka. Nike Sphere Thermal fabric uses 3D construction to trap warm air against your skin sort of like a waffle knit but without the tell-tale texture. The tightly knit face fabric keeps wind and cold air out. There's even a media port to keep your cord under control when you'd rather listen to music than random prattle.