Material: 600D Polyester. Reinforcing strap. Comfort-grip carry handle. Collapses to 4" D. when not in use. 6 Sturdy 360° swivel wheels for easy rolling. The bag body can be expanded by zippers to three levels and three layers are foldable. The bag body can be expanded by zippers from 20" to 30" to 40" high. Dimension Constructed: 24" L x 14" W x 20" H. Dimension Expand half-way: 24" L x 14" W x 30" H (The first zipper opened). Dimension Expand all the way: 24" L x 14" W x 40" H (Both zippers opened). Weight approx: 5 lbs.