100% Cotton – Comfortable,soft,breathable ribbed fabric Elastic closure Long Sleeves Pajama Set – Soft tee and pants with space pattern,ribbed cuffs & crewneck pajamas for kids and toddler. Cozy Design – Tagless label and no-pinch elastic waistband to protect your child’s delicate skin. Rocket Printing – This cute sleepwear makes your boy have a sweet dream all night. Size – Suggest to buy 1-2 size up if your child is above average or prefer loose clothes. 4 Pieces Set Package – 2* Long-sleeved T-shirt + 2* Long Pants.