Ventrix has existed in The North Face's insulation genus for a few years now, but it's worth revisiting ahead of the fall season. Ventrix is part of a subcategory of synthetic insulating jackets called active insulation; these jackets are warm and puffy but also breathable, so the idea is that you don't have to worry about shedding layers. Its name subtly implies how it works — the fluffy polyester fill includes small perforations or vents that open and close as you move to release and contain heat.
The North Face includes Ventrix in a wide range of products, but its crewneck pullover is one of the most versatile. The mid-layer contains a sufficient layer of insulation for warmth in winter but, unlike most other puffy jackets, it doesn't look like something you'd wear to walk into the mountains. Instead, its silhouette is clean, free of stitched baffles or zippers (even though it does have discrete zippered pockets).
It's that element of style, blended with Vetrix's technical capabilities, that makes this pullover so versatile. Right now, you can pick one up for a whopping 45 percent off. If you're looking for a more traditional jacket, The North Face's Ventrix Jacket and Ventrix Hooded Jacket are also 40 and 50 percent off, respectively, in a handful of colors.