Safco Twixt Active Seating Chair Extended Height GreenDescriptionSpecificationsShipping Flexible ring under base allows user to adjust angle of sit and provides movement for an active experience Height adjustable to fit a variety of users and work surfaces Built in handle under seat for easy portability Supports where and how you like to work Designed to help support better posture and balance Upholstered polyester mesh seat with 360 Deg Swivel Extended Height Powder Coated Black Due to freight costs,