1.Premium material: our heated seat cushions for outdoor chair are characterised by exquisite craftsmanship and are made of Oxford fabric, quilting, pearl cotton and sponge. In the back pocket, you can store a power bank or other small items. 2. foldable comfortable cushion: this heated cushion can be folded so that the user can easily carry it outside by putting it in the backpack. It is equipped with a highdensity memory foam cushion that gives you the feeling of sitting on a sofa. Take advantage of our comfortable cushions so you can get comfortable while pursuing your favourite sports in the stadium. 3.How to use: connect the power supply first. Then put a power bank in your pocket. 10,000mAh power bank is recommended (not included). Finally, press for three seconds to start, click the switch once to change the temperature, and press for three seconds to turn off the device. 4.Wide application: heated seat cushions are suitable for sports fans, travellers, drivers, home and office workers as well as outdoor fishing enthusiasts. Without a power bank (not included), you can still use it indoors to keep warm in winter. And with a power bank (not included), you can take it anywhere to keep warm in winter, whether indoors or outdoors.