Staying warm sans puffer takes some serious layering skills. Click through to get some now.
Start with a thin—not flimsy—camisole.
Look for flesh-colored wool, silk and cashmere in a finely gauged knit. It'll cost way more than your average Hanes three pack, but is so worth it—you'll be about a million times toastier with no extra bulk.
Sweater number one: Slightly shrunken, not too heavy.
But not too light, either! Just avoid chunky texture, like pom-poms or cabling, and you'll be safe from weird scrunchiness later on. Also: stay far away from cotton and linen—there's a reason people wear those in the summer.