100% Cotton Oh, the Things You Can Find If You Don??t Stay Behind! From the much-loved Dr. Seuss book The Cat in the Hat comes this striped cotton pajama set just for your boy. The PJ set includes a long sleeve shirt featuring the mischievous Cat in The Hat on the front. All-over red-white stripe print on the sleeves is repeated on the elastic waist bottoms. Neckline, ankle and arm cuffs are trimmed with stretchy soft ribbed fabric in contrasting soft blue color. Oh, the fun your young Dr. Seuss Fan will have while drifting off to dreamland in these cotton pajamas for boys. Designed to be snug fitting to comply with safety regulations. 100% Cotton. Officially Licensed Dr. Seuss Children’s Sleepwear.Machine Wash, Easy Care 100% Cotton Snug Fit Pajamas per US flammability requirements. Consider buying size up if prefer looser fit.