Official Merchandise. Get your little superhero ready for bedtime with these Marvel Comics Lounge/Nightwear sleep Shorts. The 2 piece set is made of 100% cotton blended fabric and features a drawstring closure for a comfortable fit. The shorts are perfect for all seasons and come in with the favourite Marvel characters. These lounge shorts are ideal for boys and are part of the Marvel Comics brand. They are perfect for keeping your little one comfortable and stylish while they relax at home. Add these to your boy's bedtime wardrobe and make bedtime more enjoyable.