ADVANCED SPRING CUSH - Sweetcrispy ging chair is equipped with advanced spring seat to imp the use of fort,balance the distribut of hip prure when sitting down,at the se time with high-density fo spon,with high resilience s to adapt to chans in sitting posture,like a luxury sofa,easy to deform and collapse,high-quality cush material to long-term use of elasticity. Make your play time more enjoyable and relaxing. ERGONOMIC DESIGN - The ba of the puter chair and both sides of the cush are equipped with a support design like wings,balancing the prure brought by the body,providing sufficient space to achieve maximum support,you can switch posits at will,and maintain a fortable experience. Stretch your body on the stretchable leather rest,cross your legs,and immerse yourself in relaxat. MULTI-FUNCTAL ADJUSTABLE - With a removable headrest and waist pillow,the waist pillow can also chan the support posit by sliding to adapt to your sitting posit,which is ideal for playing time and working time. The ba is adjusted from 90° in a focused posit to 135° in a relaxed posit,its height can be raised and lowered 3.9 inch,and the red 3-sta gas lift and upgraded mechanism angle-fixed stability and support,providing reliable support at every Angle. HIGH QUALITY MATERIAL - The desk chair adopts a thiened metal base steel fre,is more robust and stable. Pu leather,soft skin wear resistant,will not cra,at the se time,after multiple tests upgraded 3 sta gas lift,can bear up to 275 pounds. 360° smooth rotating rubber caster,rolling quiet,no da to the floor,solid metal base and lifting gas rod to the use of stability and safety,to durability,greatly extend the service life of the chair. EASY TO ASSEMBLE - We provide you with detailed installat video,short steps,easy assembly,paa contains all installat accories and paper instructs for your reference,at the se time,our te is ready to provide you with effective and timely after-sales service,timely solut to your problems..