Lightweight Fortius™ Air 20 face fabric balances outstanding air permeability with light wind resistance and is made with 42% recycled content |Lower leg reinforced with durable, lightweight, breathable, four-way stretch Fortius™ Air 5O nylon plain weave |FC0 DWR (Durable Water Repellent) finish repels moisture |25gsm stretch Coreloft™ insulation is breathable, warm, light, and performs if wet |Adjustable elastic mesh waistband for a secure fit and breathable comfort |Integrated back pocket stores gels, devices, or small essentials |Packs into its pocket for compact transport |Long ankle zip for easy on-and-off over trail running shoes |Reflective details for added visibility in low light |Fitted with a tapered leg and run-specific articulation for mobility and comfort