-Flip-up armrest allows you to adjust it up and down to accommodate sitting posture -Ergonomic backrest fits well with back curve and thus alleviates fatigue -Adjustable foot ring can be lifted up and down to rest your feet at an appropriate height -Designed with an adjustable lumbar support to fulfill the requirements of different people -Breathable mesh fabric makes the chair for all seasons especially in particular hot season -High-density sponge cushion allows you to sit for a long time with