The Delta LT Zip Neck is a lightweight microfleece pullover you can live for days-on-end. Arc'teryx designed it for versatility; functioning as a warm baselayer, a light mid layer, or as a standalone top in average temperatures. It's made of Polartec® Classic 100 micro velour small grid fleece, making it air permeable and compressible enough to pack away small. Its low-bulk fit conforms effortlessly to the female body shape. A 1/2 zip enables rapid ventilation while also pairing well with your other layers. Arc'teryx also designed it with articulation to prevent its sleeves from riding up your arm, while gusseted underarms make it easier to extend your reach.