Lacoo Black Executive Chair High-Level Faux Leather Thick Padded Ergonomic Chair Mid Back Office and Commercial Chair With Armrests. The Lacoo Ergonomic Office Desk Chair with lumbar support can give you much comfort to help you avoid backache from long time sitting. Padded armrests are super comfortable for daily use. Adjustable lever underneath the seat can adjust height and also can control the rock function. Push in to lock and pull out to rock. 5 star heavy durable base with 360 degree swivel wheels can avoid floor from scratching. Do not miss this Lacoo Office Chair to be your best partner.