Selling a chair cushion for tailbone/back pain relief for $15 OBO. Like new and fits well in the EVGR desk chair. Amazon link of similar product - Everlasting Comfort Office Chair Seat Cushion for Back, Coccyx, & Tailbone Pain Relief (Black) https://www.amazon.com/dp/B01EBDV9BU/ref=cm_sw_r_cp_api_glt_fabc_P1E18T97W4MTYAFSHWX6 (I bought mine for $35)