1.SEAT HIGH DENSITY MOLDED FOAM FOR LONG TIME GAMING, STAY IN SHAPE. 2. HEADREST AND LUMBAR SUPPORT FOR SUPPERIOR COMFORT. MATERIAL : PU WITH SPONGE RECOMBINATION & CARBON FIBER AND MESH. FOAM : MOLDED FOAM + CUT FOAM CHAIR BASE : METAL BASE MECHANISM : BUTTERFLY MECHANISM GASLIFT : SGS CERTIFIED CLASS-4 GASLIFT ARMREST : 2D ARMREST