Wobble Stool: Active learning chair that supports the body’s natural need for movement, engages your core and helps develop good posture; the convenience of storing and toting supplies Flexible Seating: Set up workspaces that promote teamwork and collaboration in classrooms, libraries, offices or at home; easily circle up for discussions or pair with student activity tables Lightweight and Portable: Durable plastic seats have built-in handles that make it easy to carry; take indoors or out to inspire learning in any environment; stools stack for storage when not in use Certified Safe: Made in the USA of imported materials, 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 13.3" D x 18" H, interior storage measures 8.5" L x 10.25" W x 10.25" H; all plastic design comes fully assembled and is maintenance-free