Take the thrill of Monster Jam with you wherever you go! Crafted from soft and breathable materials, the pajama set is designed for year-round wear, keeping your little one comfortable in any season. This comfy pajama set is made of soft breathable 100% polyester. These are the best! They feature the iconic truck known as Megalodon Predator Truck. Wash cold and low-tumble to maintain the vibrant print of the pajama set.