WEATHER PROTECTION Nike AeroLayer technology offers a layer of lightweight insulation between a water-resistant shell and breathable lining to help keep you warm and dry when the weather's not. MOVE FREELY HyperAdapt construction offers protection from the elements with advanced stretch fabric for optimal mobility that lets you move without restriction. STREAMLINED DESIGN A low-profile blade collar is designed to lay smoothly against your neck for a streamlined, distraction-free fit.