This trusty, year-round jacket reduces wind chill so you can push on in blustery conditions. Flexible and breathable WindWall® fabric ensures that you're dry and comfortable without overheating. Stows away into a pocket bag. BREATHABLE - Lightweight fabrics help regulate body temperature and keep you comfortable. WIND PROTECTION - Fabric that reduces air penetration to lock out chilly wind. PACKABLE - This piece can be packed into its own pocket for light travel. Fabric | 100% Nylon Ripstop, 100% Recycled Polyester Windwall fabric with reflective TNF Logos on the front and back and reflective branding on the back Chest zipped pocket - stow pocket bag We say:  Trail running - WindWall® allows a limited degree of external air permeability, keeping the outdoor athlete warm while providing enough airflow for a dry and comfortable fit.