THERE IS AN OPENING I THE SEAT THAT WHEN A PERSON SITS DOWN AIR IS EXPELLED AND MAKES A SOUND LIKE A SHPS HORN. IT IS ALSO A LOWER CHAIR THAN EXPEXTED AND MORE DIFFICULT TO RAISE UP FROM. I BOUHT THE CHAIR BECAUSE IT HAD A FLAT CUSHION SEAT MY PREVIOUS CHAIR HAD A SEAT THAT TILTED DOWN AND HARD TO REMAIN IN IT