3-in-1 layering system pairs an ultralight stretch shell jacket with a zip-in ThermoBall™ Eco jacket for unparalleled protection in cold, wet conditions, or for wearing separately as weather permits. [Outer Jacket] Slim fit Waterproof, breathable, seam-sealed DryVent™ 2.5L shell with mechanical stretch Zip-in-compatible integration with complementing garments from The North Face® Attached, fully adjustable hood [Inner Jacket] Slim fit 10 g/ft² ThermoBall™ Eco insulation