"Sufficient quantity: The swing cushion set includes 2 cushions and a pump, providing you with spare cushions for backup or sharing with friends, ensuring you have enough equipment for your fitness or exercise needs, they will be great giftsEasy to use: Our swing cushion set includes a manual pump that allows you to inflate the cushion to the desired height; it also comes with a deflation needle, allowing you to control the hardness of the cushion; the wave design of the cushion increases friction and prevents slipping, ensuring safe and effective exerciseHigh-quality materials: The balance cushion is made of high-quality PVC material, which is sturdy and durable and can withstand up to 450 pounds; you can easily exercise your core muscles and stay focused while working in the classroom or at your deskWide application: These balance trainers are versatile and can be used for a variety of purposes; they are great for improving focus and concentration, making them useful when students are reading or taking classes; in addition, their simple exercise method makes them suitable for those who want to incorporate balance training into their fitness plan"