I've had and loved this Bungee Office Chair for over ten years.  Bungee cords are starting to fray.  I purchased replacements, but they require someone way stronger than me to replace them, they need to be stretched to replace.  But the chair is extremely comfortable, and still useable, but I'm also giving away the new replacement bungees.  Hight adjustable, swivle, it is a really good chair.

Here is the website for the "newer" model:  https://www.containerstore.com/s/office/desk-chairs/bungee-office-chair/12d?productId=11018217