30% of buyers opt to size up 1 size The NovaUL Jacket was designed as a solution to the long-standing problem that most ultralight jackets experience in the presence of moisture - "wetting out." Our Nova technologies come together in a puffy down jacket that offers superior wind-blocking, down retention, & loft retention even in wet conditions. More Reliable Insulation: Our proprietary DownLT ™ insulation combines 850 Fill Power HyperDry™ down (Allied RDS down - responsibly sourced) with a small percentage of synthetic to bring you a more stable insulation that stays lofted and warm even when soaking wet. No Stitches to Snag: Nova Zero Stitch™ Fabric is neither bonded nor stitched, but literally woven into place. The I-tube baffle design gives the NovaUL a brand new look while eliminating the chance for stitches to wear out or snag on things as you brush by. There are 10,000 fewer stitch holes in the NovaUL than a typical puffy jacket - we counted! More Water Resistant: Even when soaking wet, DownLT™ insulation stays lofted and warm. But odds are that in most cases the Zero Stitch™ fabric will prevent moisture from entering your ultralight jacket in the first place. With fewer stitch holes & a DWR treated shell, the NovaUL will stay quite lofted & warm through those unexpected storms. Full Featured: Features include thumb holes, a drop back, pit zips, YKK zippered side pockets, & 2-way hood adjustments - all in a jacket weighing under 15 oz. The NovaUL Jacket is designed to perform in various conditions without compromising on comfort. Stay warm, dry, & protected on your adventures with a more reliable puffy down jacket. This jacket is ideal for all 3-season applications and uses. The fit should be just loose enough to fit a base layer & something like the Ventus Hoodie beneath it, but shouldn't be much larger than that.