Polar Express Pajama SetLong sleeve design for full coverage Ultra soft, breathable, stretchy fabric 95% viscose from bamboo, 5% spandex Keeps little ones cool and comfortable overnight Ideal for children who tend to overheat 2 piece set includes long sleeve top and long pants Snug fitting; not treated with flame retardants Machine wash cold with like colors Tumble dry low; cool iron if needed Updated sizing with increased leg length for longer fit True to size for other