Flip Up Armrests: Putting your elbowson the thick padded armrests is more comfortable. Also the flip up function is very practical. Ergonomic Design: Ergonomic back design can provide much support to avoid backache. Multi Functions: A lever underneath the seat can adjust seat height and enable rock function. Push in to lock in place, pull out to rock. Updated Materials: Updated materials including breathable double layer mesh and high density foam can provide you super comfort when sitting for a long time. Easy Assembly: Easy assembly required. Save more your precious time.Product Dimensions: 20.5" x 19.5" x 41.9"(L x W x H) Inches Package Dimensions: 24.8" x 11" x 23.5"(L x W x H) Inches Maximum Weight Capacity: 300 LBS 5-year limited warranty Item Weight: 30.3 LBSColor: Black Carton includes: 1 X A brand new office chair 1 X A clear installation instruction 1 X A complete installation tool package[ERGONOMIC DESIGN] S curve model backrest designed according to ergonomic will give you lumbar support, soft padding and waterfall seat edge for less pressure on the back of your legs so you can stay comfortable even when you have to sit down for hours. [HIGH-END MATERIAL] 3.2 inches thick padded seat, full PU leather covered armrests, skin friendly and wear-resisting, high density shaping foam, more comfortable, anti-oxidation, elasticity resilience and service life. [MULTI-FUNCTION] 360-degree swivel, heavy-duty base and smooth-rolling casters make a superb stable structure, the whole chair can rocked back and forth, you can personally adjust the chairs height of the chair to match your needs, perfect for relax during your busy working days. [PRODUCT DIMENSION] Back size 19.8"X24.0" (L x W), seat size 19.8"X18.5" (L x W), seat adjustable height from 16.0" to 19.5", and maximum weight capacity 300lbs. [WHAT YOU GET] A comfortable office chair, all the tools needed for assembly, one year worry-free service, great after-sales service within 24 hours.