Burton Kids' Fleece Base Layer Set Quick-drying and highly-breathable DRYRIDE Ultrawick polyester and spandex fleece construction pulls heat-robbing moisture away from the skin Stretch 180 fabric construction with four-way stretch provides unrestricted mobility Anti-pilling for long-lasting softness; Thumbhole cuffs on the top lock sleeves in place Softlock seams eliminate overlapping fabric for comfort; Elastic waistband secures the fit One-year warranty