-Tag less design for ultimate comfort for your little. - Heat regulating fabric design keeping your little one warm in the winter and cool in the summer. * Made to grow with your child. Our bamboo viscose jams are so stretchy they will fit longer than any other jams you own! * Double Zippers & hand and feet fold over cuffs on all sizes - 95% bamboo 5% viscose - machine wash cold, tumble dry on low heat.