Most of the turtlenecks we tested are all-cotton, with spandex in collars and cuffs to prevent stretching. The sleeves in some of our samples shrank almost two inches. Dye bleed can also be a problem with turtlenecks in dark colors. You should wash them separately at first. Lands' End and J.C. Penney turtlenecks also scored high overall, in both men's and women's categories.
Most fleece is made of polyester.
Some is a blend of fibers, like polyester and acrylic. Some is branded, like Polartec. We found no great differences in performances among the fabrics. Eddie Bauer, Lands' End and L.L. Bean models stood out in both men's and women's styles. The Sears Workwear men's pullover was also high rated.