[Pain Relief] This inflatable donut pillow is designed with a special donut shape that conforms to your body having a superior cushioning. Ergonomic design helps relieve the sitting stress and increase blood flow. Perfect for who suffers from tailbone pain, postpartum and longtime sitting. [Durable and Leakproof] This inflatable donut seat cushion is made of high-quality thick flocked PVC, which is sturdy and durable. Having good leakproof bringing a comfortable sitting experience.[Adjustable Design] This inflatable donut seat cushion features double air valve that is easy to inflate the donut seat cushion. (Pump not included) An upgraded quick valve and a regular valve for inflation or deflation. Easy to use, just press the air nozzle in the middle to adjust the inflatable donut seat cushion for a suitable height.[Lightweight and Portable] This inflatable donut pillow measures 45.5x39x11cm/17.9x 15.3x 4.3in and has a inner diameter of 19.5x16cm/7.7x 6.3in. Portable and foldable for easier carry. Also, the inflatable donut pillow is lightweight of about 0.55 lbs that is effortless to take.[Wide Application] This inflatable donut pillow is suitable for wide application. It is suitable for various chairs such as office chair, wheelchair, home chair, etc. Perfect for home, office, study use. Also, it is portable to carry for travel, airplane, car, stadium and more. Detailed description: Description:This inflatable donut pillow features ergonomic design that is comfortable to sit on. And double air valve design makes it easy to adjust a right height for sitting.Key FeatureRelieve Sitting Discomfort: This inflatable donut pillow can effectively relieve discomfort, aches and fatigue while driving or sitting for long periods. Enjoy comfort donut cushion pillow while sitting for extended periods of time.Ergonomic Design: The ergonomic donut cushion adopts donut shape combined with hollow design. Relieve the pressure on the tailbone and stabilize and align your spine.SpecificationName: Inflatable Donut Seat CushionMaterial: Flocked PVCColour: GreySize: 45.5x39x11cm/17.9x 15.3x 4.3inInner Diameter:19.5x16cm/7.7x 6.3inProduct Material: PVC and suede clothSquare 9 Holes : 48*48cmRound : 38cm(Diameter) Parts List: 1×Inflatable Donut Seat Cushionor1* Square Seat Cushion(9 Holes)