Material - 600 D Polyester construction. The main compartment opens with a twin zipper closure. Reinforcing strap. Three levels are fordable. Comfort-grip carry handle. Adjustable and Removable shoulder strap. Two front pockets for last-minute storage. Collapses to 4" D. when not in use. Five sturdy 360° swivel wheels for easy rolling. Bag body can be expanded by zippers from 16" to 26" to 36" high. Dimension Constructed: 21.5" L x 12.5" W x 16" H. Dimension Expand halfway: 21.5" L x 12.5" W x 26" H (First zipper opened). Dimension Expand all the way: 21.5" L x 12.5" W x 36" H (Both zippers opened). Weight: 4 lbs. *** No retractable/pull out handle ***