Blue Cotton Flannel Pajama Set Made in blue cotton flannel, consisting of a long-sleeve shirt and pants. Composition: 100% cotton. Care Instructions: Hand wash or use low temperatures on a delicate cycle. Do not use bleach or chlorine-based products. Iron at a maximum temperature of 110ºC. Dry clean only with products that do not contain trichloroethylene. Do not bleach. Dry flat in the shade and wash inside out.