Manual Pressurized Inflation System: Featuring a unique inflation and deflation mechanism, this inflatable seat cushion eliminates the need for an external air pump. Simply press rapidly ten times to fully inflate, offering swift inflation and a leak-proof sealFully Adjustable to Your Comfort Needs: You have full control over the firmness of the travel seat cushion. Whether you prefer firmer or softer support, you can easily inflate or deflate the cushion using the built-in air pump or air release button, even while sitting on it. This allows you to find your perfect comfort sweet spot every timeEffortless Portability for Pain - Free Travel: The pressure relief seat cushion is incredibly lightweight and compact. It folds into a small carry bag that easily fits into your carry - on luggage, bag, or backpack. This ensures that you can take it with you wherever you go and never have to experience uncomfortable flights or long - hours sitting againPremium Materials: Our 3D inflatable portable seat cushion boasts a soft, smooth touch thanks to its combination of Lycra and TPU materials. The bottom of the cushion is lined with high-grade anti-slip particles, ensuring a secure grip and preventing slippage on most surfacesOrthopedic Recommended Spine Protection Design: 7-zone pressure dispersion patented technology, targeted support for the coccyx-sciatic-lumbar triangle, continuous use for 4 hours to reduce the back pain rate by 73% -- a must-have for drivers/programmers/lumbar disc herniation.