Best Heavyweight Fleece Jackets for Deep-Winter Layering, Ranked

Heavyweight fleece trades some breathability and packability for lofty insulation, durable warmth, and some wind resistance—ideal as a standalone in still, subfreezing air or as a powerful midlayer beneath a shell or puffer during active cold-weather days. Below, we rank the warmest heavyweight fleeces for deep-winter layering and map each to its ideal use so you can pick with confidence.

Heavyweight fleece, defined (40–50 words): A dense, high‑pile or thick‑knit polyester fleece built for maximum heat retention and moderate wind resistance. It’s bulkier and generally less breathable than grid or technical fleeces, but excels for low‑output use in subfreezing temperatures and as a heat‑holding midlayer in storms.