Hello Kitty Girls Thermal Underwear Set (Little Kid/Big Kid) Cotton/Polyester blend Imported Machine Wash Thermal long underwear set; Not intended for sleepwear Ribbed-knit collar; Double stitched hems; Ribbed-knit cuffs Soft fabric blend provides complete comfort and warmth Features everyones favorite cat, Hello Kitty Great for layering; Extra soft and easy to care for