Wobble Stool: Active seating for users to wiggle and wobble while sitting; rounded base allows freedom of movement, encourages proper posture while working, and engages your core Flexible Seating: Quickly rearrange workspaces to promote teamwork and collaboration in classrooms, libraries, offices or at home; circle up for discussions or pair with student activity tables Durable Design: Lightweight chairs are designed for daily indoor or outdoor use; constructed with UV-protected recyclable plastic; built-in handles make it easy to carry; stools stack for storage Certified Safe: Made in the USA of imported materials, UL GREENGUARD Gold Certified for low VOCs, CPSIA compliant, and meets the requirements of ANSI/BIFMA X6.1 Educational Seating sections 8 and 10 Product Dimensions: Stool measures 13.5" D x 18" H; one-piece design comes fully assembled and is maintenance-free; Adult Active Engaged & Direct Supervision Required