Warehouse sale!huge discount! All the office chairs I sell come from online stores, where customers returned them. They've been rarely used or not used at all, and the vast majority are in good condition. These office chairs are highly comfortable; my family and I use them. They are priced at only one-third of the cost of new ones, which is a great deal. Parts in the box ones and assembled ones available. Amazon: $159.98 My price: $35 Pick up in Pomona or Diamond Bar, California. About this item 【Ergonomic Design】Silybon office chair is ergonomically designed to provide 3 support points (back/hip/hand) and proper lumbar support. The seat height can be easily adjusted to meet different needs. Strong stability, even lying down will not fall. With adjustable height and 360° free rotation, this mesh work chair supports shoulder and back relaxation, and can be ergonomically enhanced with adjustable lumbar support and armrests for customized comfort. 【Breathable Mesh】The backrest and cushion are breathable. Made of high quality mesh to make it stable, in good shape and elastic. Let you have a comfortable experience. Made of virgin cotton material, the office chair intelligently responds to your body's unique characteristics to perfectly support your weight, size and even temperature, and it will help you feel more comfortable at work that requires prolonged sitting. And this chair has a mesh back that allows airflow to keep you cool. 【Easy Adjustment for Custom Comfort】After 100,000 experiments, the seat surface is durable for 10 years, the 360-degree rotation is durable for 10 years. Thicker seat cushions and blast seat pans give you more comfort and double coverage. You can flip arms up and place the chair under the table to save space. The chairs can be placed arbitrarily in relatively narrow areas. The simple and beautiful design is suitable for different decoration styles, for living room, study, office etc.. 【Easy to Operate Rolling Base & Simple Installation】Designed with a sturdy nylon base, this adjustable computer chair can support up to 300 lbs during 8 hours of continuous use. Rolling casters allow you to move easily and smoothly on the office floor. Works on any floor without damage. Detailed installation videos are in the manual and related videos section. You can easily and quickly install it yourself.