Material - 600D Polyester construction. The main compartment opens with a twin zipper closure. Reinforcing strap. Three levels are foldable. Comfort-grip carry handle. Adjustable and Removable shoulder strap. Two front pockets for last-minute storage. Collapses to 4" D. when not in use. 4 sturdy 360° swivel wheels for easy rolling. The bag body can be expanded by zippers from 15" to 22.5" to 30" high. Dimension Constructed: 18" L x 13" W x 15" H. Dimension Expand halfway: 18" L x 13" W x 22.50" H (The first zipper opened). Dimension Expand all the way: 18" L x 13" W x 30" H (Both zippers opened). Weight: 4 lbs. *** No retractable/pull-out handle **