The Arc'teryx Delta AR Zip is a lightweight, trim-fitting fleece layer. High-loft fleece provides a great warmth-to-weight ratio, and the trim fit and long length help it work well as an insulating layer.
Features:
Polartec™ Thermal Pro™ high-loft fleece
High-loft fleece packs down small
Trim fit enhances wicking performance and layers easily
Long length provides plenty of protection from wind, snow, and rain