NOTE: A minimum desk height of 66 cm is required for this size. Please measure your desk before purchasing. This is the original active sitting ball chair for use in the office, at home in the living room, classroom, or gym. Excellent complementary ergonomic alternative sitting stool solution for desk sitting and standing desks.^ Health: Activates back and core support muscles, promoting good posture and potentially relieving back pain for adults and children. Comfortable substitute for pregnancy ball, birthing ball, or medicine ball.^ Perfect for abdominal exercises, yoga, back stretching, posture training, therapy, and physio ball balance training, also promotes flexible joints for a healthy lifestyle.^ Patented self-standing base design with a weight limit of 181 kg and extra thick carrying handle makes the seat the perfect combination of a Swiss exercise ball and an ergonomic office chair. And two materials are available: coarse felt and superfiber cloth.^ Packaging: There is a yoga ball with an extra air plug, a ball cover, a pump for inflation, and also an instruction. Some effort is required for installation, use the included accessories (hand pump/air pump adapter) to inflate the inner sitting ball until the outer cover is completely filled. Please contact us if the inner ball seems too small or if pumping takes longer than 20 minutes.