This very versatile half zip has a warm, stretch fabric, with wind protection on the front but additional venting under the arms and on the back. Ideal for any winter training activity, from skiing to running to cycling. Designed for: Breathability; Windproof; Thermal protection. Composition back: pa 79%, el 21% body insert: pes 100% front: pes 100% insert: pa 86%, el 14%. Technologies: Smart skin. Motion fit. Advancedskin shield. Active fit. 1/2 zip with stay down puller. Flatlock seams. 1 chest pocket. Reflective branding front & back.