It is impossible to actually sit on a Jari Activstool, no lying back, no slouching and definitely no sitting still | With a rotating convex base Jari forms one leg of a stable tripod, your own legs provide the other two parts | That means you are constantly flexing, adjusting and moving; the ideal way to stay focussed and concentrate | The coolest thing about Jari Activstool is that it is gas height adjustable | That means it fits a huge range of students and just about any application: Classrooms, Libraries, Study groups, Open spaces, Collaborative learning, Behind a desk or on its own | No longer do you need various sizes of stools to suit the range of your student population, Jari Activstool adjusts to suit almost everyone in a senior school environment, right up to adult size | Green soft fabric convex seat pad | White light weight and durable polypropylene seat frame with under-seat grip handles for easy transport