Material: 600 D Polyester 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. 4 of Sturdy 360° swivel wheels for easy rolling. Bag body can be expanded by zippers from 14" to 22" to 30" high. Dimension Constructed: 18" L x 10.5" W x 14" H (Check-in Size) Dimension Expand halfway: 18" L x 10.5" W x 22" H (First zipper opened) Dimension Expand all the way: 18" L x 10.5" W x 30" H (Both zippers opened) Weight: 3 lbs. Need to open all the zippers at the bottom of the bag, and the bag will be big.