Thank you for viewing. Handmade disaster prevention hood cover Cushion type Length: 36.5 cm Width: 33 cm The straps to secure it to the chair have Velcro and are adjustable in length. Since they are not elastic, they won't stretch out and require replacement. The opening uses a spring hook, making it easy for children to open and close. The front of the chair becomes the opening, so in an emergency, you can take out the disaster prevention hood while still under the desk.