The Mens Arcteryx Delta AR Zip Neck Fleece is a mid-weight piece that performs on its own or within any layering scheme. Made of Polartec® Thermal Pro® high loft grid, the Delta AR Zip Neck top provides excellent warmth and breathability. The high loft grid fleece of the Arcteryx Delta AR fleece traps heat and the deep cut zip lets you vent on the go. Other features include a DWR finish; high compressibility for easy packing; and a trim athletic fit that enhances moisture wicking performance and minimizes bulk for easy layering. The Mens Arcteryx Delta AR Zip Neck Fleece is lightweight, breathable, and highly compressible.