Arcteryx Delta AR Zip Neck: Schooled in versatility, this efficient layer traps heat and packs small. Grid texture layers with ease, the deep zip vents heat and the long cut tucks in to keep snow out. Arcteryx Delta AR Zip Neck Features: Great warmth to weight ratio Half zip Trim fit for optimal layering Materials: Polartec® Thermal Pro® high void grid loftMore details about product Arcteryx Delta AR Zip Neck - Mens