Both are lightweight, made from premium nylon, and inflate using a cage ball inflator. Once inflated, they stay inflated for up to 3 hours! Use with or without the parachutes. Activity Sets include either Ollie (48"H) or Stella (60"H), each with a storage bag, plus two 12' dia ElevAir™ Deluxe Parachutes made of durable rip-stop nylon, each with a deluxe bag with shoulder strap, and activity instructions.