Fabric: AB side cationic Zero-sensitive, breathable, no loose edges, no rolled edges and no deformation Boneless stitching inside and out, no bumps, no abrasion on baby's skin Kids thermal sets are unlike traditional cotton long underwear may damage your babys skin, we use softer materials to protect your babys skin comfort in winter. Base layer set with soft fabric and lightweight design that suitable for indoor and outdoor winter activities, such as outdoor jogging, indoor party. Thermal underwear adopt elegant design to easily meet different daily needs. Toddler thermal underwear set is the best expression of your love in winter that keep sold air away from your children delicate body. The kids thermal sets makes your children without fear of the cold and enjoy happiness of every day.