Material: 600D Polyester Reinforcing strap. Three levels are foldable. Comfort-grip carry handle. Collapses to 4" D. when not in use. 6 sturdy 360° swivel wheels for easy rolling. 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 halfway: 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: 4.5 lbs.