ExOfficio Women's Irresistible Neska Stripe Turtle Neck Shirt Incredibly soft 100% nylon with Chenille Space Dye and a contour fit keeps you looking stylish even on the trail. ExOfficio designed this sweater with a high weight-to-thermal quality so you can stay warm and cozy even in cold, raw conditions. This extremely lightweight turtle neck is wrinkle-resistant, quick-drying and takes up very little space, which is perfect for an active woman's pack.