The Twixt® Active Seating Chair is designed to help support better posture and balance for a more active, healthy workday. There is a flexible ring under the base of the chair that allows the user to adjust the angle of sit to provide movement for an active sitting experience and the 360 degree swivel capabilities allows for easy movement. It is also height-adjustable to fit a variety of users and work surfaces. The built-in handle underneath the seat allows the chair to be easily moved from place to place for convenient mobility across the office to create a chair that supports where and how you like to work. Its minimalist design helps to support better posture and balance, as well as creating a polished and professional aesthetic for any area. Ships ready for easy assembly. Attention California Residents: WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/furniture.